Documentation: updated examples and TLS configuration. File
proto/CONNECTION_CACHE_README.html.
+
+20210418
+
+ Bitrot: new "known_tcp_ports" configuration parameter to
+ reduce Postfix dependency on the services(5) database.
+ There is no agreement about the name of the port 465 service:
+ the intersection of different systems is reportedly empty.
+ By default, Postfix now "knows" the port numbers for SMTP
+ services. Files: proto/postconf.proto, global/Makefile.in,
+ global/config_known_tcp_ports.c, global/config_known_tcp_ports.h,
+ global/config_known_tcp_ports.ref, global/mail_params.c,
+ global/mail_params.h, global/mail_version.h,
+ global/namadr_list.ref, master/master.c,
+ posttls-finger/Makefile.in, posttls-finger/posttls-finger.c,
+ smtp/Makefile.in, smtp/smtp.c, smtp/smtp_connect.c,
+ smtpd/smtpd.c, util/Makefile.in, util/find_inet.c,
+ util/known_tcp_ports.c, util/known_tcp_ports.h,
+ util/known_tcp_ports.ref, util/myaddrinfo.c.
better than black. Instead, Postfix prefers 'allowlist', 'denylist',
and variations on those words.
+Set "respectful_logging = no" in main.cf to keep using the old
+behavior (parameter names and logging).
+
Noel Jones assisted with the initial transition.
Changes in documentation
".") that Postfix may use to determine whether DNSSEC validation
is available.
+ <b>known_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submis-</b>
+ <b>sion=587)</b>
+ Optional setting that avoids lookups in the <b>services</b>(5) data-
+ base.
+
<b>MIME PROCESSING CONTROLS</b>
Available in Postfix version 2.0 and later:
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtp_send_xforward_command">smtp_send_xforward_command</a> (no)</b>
- Send the non-standard XFORWARD command when the Postfix SMTP
+ Send the non-standard XFORWARD command when the Postfix SMTP
server EHLO response announces XFORWARD support.
<b>SASL AUTHENTICATION CONTROLS</b>
Enable SASL authentication in the Postfix SMTP client.
<b><a href="postconf.5.html#smtp_sasl_password_maps">smtp_sasl_password_maps</a> (empty)</b>
- Optional Postfix SMTP client lookup tables with one user-
- name:password entry per sender, remote hostname or next-hop
+ Optional Postfix SMTP client lookup tables with one user-
+ name:password entry per sender, remote hostname or next-hop
domain.
<b><a href="postconf.5.html#smtp_sasl_security_options">smtp_sasl_security_options</a> (noplaintext, noanonymous)</b>
Postfix SMTP client SASL security options; as of Postfix 2.3 the
- list of available features depends on the SASL client implemen-
+ list of available features depends on the SASL client implemen-
tation that is selected with <b><a href="postconf.5.html#smtp_sasl_type">smtp_sasl_type</a></b>.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtp_sasl_mechanism_filter">smtp_sasl_mechanism_filter</a> (empty)</b>
- If non-empty, a Postfix SMTP client filter for the remote SMTP
+ If non-empty, a Postfix SMTP client filter for the remote SMTP
server's list of offered SASL mechanisms.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#smtp_sender_dependent_authentication">smtp_sender_dependent_authentication</a> (no)</b>
Enable sender-dependent authentication in the Postfix SMTP
- client; this is available only with SASL authentication, and
- disables SMTP connection caching to ensure that mail from dif-
+ client; this is available only with SASL authentication, and
+ disables SMTP connection caching to ensure that mail from dif-
ferent senders will use the appropriate credentials.
<b><a href="postconf.5.html#smtp_sasl_path">smtp_sasl_path</a> (empty)</b>
Implementation-specific information that the Postfix SMTP client
- passes through to the SASL plug-in implementation that is
+ passes through to the SASL plug-in implementation that is
selected with <b><a href="postconf.5.html#smtp_sasl_type">smtp_sasl_type</a></b>.
<b><a href="postconf.5.html#smtp_sasl_type">smtp_sasl_type</a> (cyrus)</b>
- The SASL plug-in type that the Postfix SMTP client should use
+ The SASL plug-in type that the Postfix SMTP client should use
for authentication.
Available in Postfix version 2.5 and later:
<b><a href="postconf.5.html#smtp_sasl_auth_cache_name">smtp_sasl_auth_cache_name</a> (empty)</b>
- An optional table to prevent repeated SASL authentication fail-
- ures with the same remote SMTP server hostname, username and
+ An optional table to prevent repeated SASL authentication fail-
+ ures with the same remote SMTP server hostname, username and
password.
<b><a href="postconf.5.html#smtp_sasl_auth_cache_time">smtp_sasl_auth_cache_time</a> (90d)</b>
- The maximal age of an <a href="postconf.5.html#smtp_sasl_auth_cache_name">smtp_sasl_auth_cache_name</a> entry before it
+ The maximal age of an <a href="postconf.5.html#smtp_sasl_auth_cache_name">smtp_sasl_auth_cache_name</a> entry before it
is removed.
<b><a href="postconf.5.html#smtp_sasl_auth_soft_bounce">smtp_sasl_auth_soft_bounce</a> (yes)</b>
- When a remote SMTP server rejects a SASL authentication request
- with a 535 reply code, defer mail delivery instead of returning
+ When a remote SMTP server rejects a SASL authentication request
+ with a 535 reply code, defer mail delivery instead of returning
mail as undeliverable.
Available in Postfix version 2.9 and later:
<b><a href="postconf.5.html#smtp_send_dummy_mail_auth">smtp_send_dummy_mail_auth</a> (no)</b>
- Whether or not to append the "AUTH=<>" option to the MAIL FROM
+ Whether or not to append the "AUTH=<>" option to the MAIL FROM
command in SASL-authenticated SMTP sessions.
<b>STARTTLS SUPPORT CONTROLS</b>
- Detailed information about STARTTLS configuration may be found in the
+ Detailed information about STARTTLS configuration may be found in the
<a href="TLS_README.html">TLS_README</a> document.
<b><a href="postconf.5.html#smtp_tls_security_level">smtp_tls_security_level</a> (empty)</b>
<a href="postconf.5.html#smtp_tls_enforce_peername">smtp_tls_enforce_peername</a>.
<b><a href="postconf.5.html#smtp_sasl_tls_security_options">smtp_sasl_tls_security_options</a> ($<a href="postconf.5.html#smtp_sasl_security_options">smtp_sasl_security_options</a>)</b>
- The SASL authentication security options that the Postfix SMTP
+ The SASL authentication security options that the Postfix SMTP
client uses for TLS encrypted SMTP sessions.
<b><a href="postconf.5.html#smtp_starttls_timeout">smtp_starttls_timeout</a> (300s)</b>
- Time limit for Postfix SMTP client write and read operations
+ Time limit for Postfix SMTP client write and read operations
during TLS startup and shutdown handshake procedures.
<b><a href="postconf.5.html#smtp_tls_CAfile">smtp_tls_CAfile</a> (empty)</b>
- A file containing CA certificates of root CAs trusted to sign
- either remote SMTP server certificates or intermediate CA cer-
+ A file containing CA certificates of root CAs trusted to sign
+ either remote SMTP server certificates or intermediate CA cer-
tificates.
<b><a href="postconf.5.html#smtp_tls_CApath">smtp_tls_CApath</a> (empty)</b>
- Directory with PEM format Certification Authority certificates
+ Directory with PEM format Certification Authority certificates
that the Postfix SMTP client uses to verify a remote SMTP server
certificate.
File with the Postfix SMTP client RSA certificate in PEM format.
<b><a href="postconf.5.html#smtp_tls_mandatory_ciphers">smtp_tls_mandatory_ciphers</a> (medium)</b>
- The minimum TLS cipher grade that the Postfix SMTP client will
+ The minimum TLS cipher grade that the Postfix SMTP client will
use with mandatory TLS encryption.
<b><a href="postconf.5.html#smtp_tls_exclude_ciphers">smtp_tls_exclude_ciphers</a> (empty)</b>
client cipher list at all TLS security levels.
<b><a href="postconf.5.html#smtp_tls_mandatory_exclude_ciphers">smtp_tls_mandatory_exclude_ciphers</a> (empty)</b>
- Additional list of ciphers or cipher types to exclude from the
- Postfix SMTP client cipher list at mandatory TLS security lev-
+ Additional list of ciphers or cipher types to exclude from the
+ Postfix SMTP client cipher list at mandatory TLS security lev-
els.
<b><a href="postconf.5.html#smtp_tls_dcert_file">smtp_tls_dcert_file</a> (empty)</b>
Enable additional Postfix SMTP client logging of TLS activity.
<b><a href="postconf.5.html#smtp_tls_note_starttls_offer">smtp_tls_note_starttls_offer</a> (no)</b>
- Log the hostname of a remote SMTP server that offers STARTTLS,
+ Log the hostname of a remote SMTP server that offers STARTTLS,
when TLS is not already enabled for that server.
<b><a href="postconf.5.html#smtp_tls_policy_maps">smtp_tls_policy_maps</a> (empty)</b>
fied, this overrides the obsolete <a href="postconf.5.html#smtp_tls_per_site">smtp_tls_per_site</a> parameter.
<b><a href="postconf.5.html#smtp_tls_mandatory_protocols">smtp_tls_mandatory_protocols</a> (see 'postconf -d' output)</b>
- TLS protocols that the Postfix SMTP client will use with manda-
+ TLS protocols that the Postfix SMTP client will use with manda-
tory TLS encryption.
<b><a href="postconf.5.html#smtp_tls_scert_verifydepth">smtp_tls_scert_verifydepth</a> (9)</b>
The verification depth for remote SMTP server certificates.
<b><a href="postconf.5.html#smtp_tls_secure_cert_match">smtp_tls_secure_cert_match</a> (nexthop, dot-nexthop)</b>
- How the Postfix SMTP client verifies the server certificate
+ How the Postfix SMTP client verifies the server certificate
peername for the "secure" TLS security level.
<b><a href="postconf.5.html#smtp_tls_session_cache_database">smtp_tls_session_cache_database</a> (empty)</b>
session cache.
<b><a href="postconf.5.html#smtp_tls_session_cache_timeout">smtp_tls_session_cache_timeout</a> (3600s)</b>
- The expiration time of Postfix SMTP client TLS session cache
+ The expiration time of Postfix SMTP client TLS session cache
information.
<b><a href="postconf.5.html#smtp_tls_verify_cert_match">smtp_tls_verify_cert_match</a> (hostname)</b>
- How the Postfix SMTP client verifies the server certificate
+ How the Postfix SMTP client verifies the server certificate
peername for the "verify" TLS security level.
<b><a href="postconf.5.html#tls_daemon_random_bytes">tls_daemon_random_bytes</a> (32)</b>
- The
number of pseudo-random bytes that an <a href="smtp.8.html"><b>smtp</b>(8)</a> or <a href="smtpd.8.html"><b>smtpd</b>(8)</a>
- process requests from the <a href="tlsmgr.8.html"><b>tlsmgr</b>(8)</a> server in order to seed its
+ The
number of pseudo-random bytes that an <a href="smtp.8.html"><b>smtp</b>(8)</a> or <a href="smtpd.8.html"><b>smtpd</b>(8)</a>
+ process requests from the <a href="tlsmgr.8.html"><b>tlsmgr</b>(8)</a> server in order to seed its
internal pseudo random number generator (PRNG).
<b><a href="postconf.5.html#tls_high_cipherlist">tls_high_cipherlist</a> (see 'postconf -d' output)</b>
The OpenSSL cipherlist for "export" or higher grade ciphers.
<b><a href="postconf.5.html#tls_null_cipherlist">tls_null_cipherlist</a> (eNULL:!aNULL)</b>
- The OpenSSL cipherlist for "NULL" grade ciphers that provide
+ The OpenSSL cipherlist for "NULL" grade ciphers that provide
authentication without encryption.
Available in Postfix version 2.4 and later:
<b><a href="postconf.5.html#smtp_sasl_tls_verified_security_options">smtp_sasl_tls_verified_security_options</a> ($<a href="postconf.5.html#smtp_sasl_tls_security_options">smtp_sasl_tls_secu</a>-</b>
<b><a href="postconf.5.html#smtp_sasl_tls_security_options">rity_options</a>)</b>
- The SASL authentication security options that the Postfix SMTP
- client uses for TLS encrypted SMTP sessions with a verified
+ The SASL authentication security options that the Postfix SMTP
+ client uses for TLS encrypted SMTP sessions with a verified
server certificate.
Available in Postfix version 2.5 and later:
<b><a href="postconf.5.html#smtp_tls_fingerprint_cert_match">smtp_tls_fingerprint_cert_match</a> (empty)</b>
- List of acceptable remote SMTP server certificate fingerprints
- for
the "fingerprint" TLS security level (<b><a href="postconf.5.html#smtp_tls_security_level">smtp_tls_secu</a>-</b>
+ List of acceptable remote SMTP server certificate fingerprints
+ for
the "fingerprint" TLS security level (<b><a href="postconf.5.html#smtp_tls_security_level">smtp_tls_secu</a>-</b>
<b><a href="postconf.5.html#smtp_tls_security_level">rity_level</a></b> = fingerprint).
<b><a href="postconf.5.html#smtp_tls_fingerprint_digest">smtp_tls_fingerprint_digest</a> (see 'postconf -d' output)</b>
- The message digest algorithm used to construct remote SMTP
+ The message digest algorithm used to construct remote SMTP
server certificate fingerprints.
Available in Postfix version 2.6 and later:
<b><a href="postconf.5.html#smtp_tls_protocols">smtp_tls_protocols</a> (see postconf -d output)</b>
- TLS protocols that the Postfix SMTP client will use with oppor-
+ TLS protocols that the Postfix SMTP client will use with oppor-
tunistic TLS encryption.
<b><a href="postconf.5.html#smtp_tls_ciphers">smtp_tls_ciphers</a> (medium)</b>
- The minimum TLS cipher grade that the Postfix SMTP client will
+ The minimum TLS cipher grade that the Postfix SMTP client will
use with opportunistic TLS encryption.
<b><a href="postconf.5.html#smtp_tls_eccert_file">smtp_tls_eccert_file</a> (empty)</b>
- File with the Postfix SMTP client ECDSA certificate in PEM for-
+ File with the Postfix SMTP client ECDSA certificate in PEM for-
mat.
<b><a href="postconf.5.html#smtp_tls_eckey_file">smtp_tls_eckey_file</a> ($<a href="postconf.5.html#smtp_tls_eccert_file">smtp_tls_eccert_file</a>)</b>
- File with the Postfix SMTP client ECDSA private key in PEM for-
+ File with the Postfix SMTP client ECDSA private key in PEM for-
mat.
Available in Postfix version 2.7 and later:
<b><a href="postconf.5.html#smtp_tls_block_early_mail_reply">smtp_tls_block_early_mail_reply</a> (no)</b>
- Try to detect a mail hijacking attack based on a TLS protocol
- vulnerability (CVE-2009-3555), where an attacker prepends mali-
- cious HELO, MAIL, RCPT, DATA commands to a Postfix SMTP client
+ Try to detect a mail hijacking attack based on a TLS protocol
+ vulnerability (CVE-2009-3555), where an attacker prepends mali-
+ cious HELO, MAIL, RCPT, DATA commands to a Postfix SMTP client
TLS session.
Available in Postfix version 2.8 and later:
Available in Postfix version 2.11 and later:
<b><a href="postconf.5.html#smtp_tls_trust_anchor_file">smtp_tls_trust_anchor_file</a> (empty)</b>
- Zero or more PEM-format files with trust-anchor certificates
+ Zero or more PEM-format files with trust-anchor certificates
and/or public keys.
<b><a href="postconf.5.html#smtp_tls_force_insecure_host_tlsa_lookup">smtp_tls_force_insecure_host_tlsa_lookup</a> (no)</b>
- Lookup the associated DANE TLSA RRset even when a hostname is
+ Lookup the associated DANE TLSA RRset even when a hostname is
not an alias and its address records lie in an unsigned zone.
<b><a href="postconf.5.html#tlsmgr_service_name">tlsmgr_service_name</a> (tlsmgr)</b>
Available in Postfix version 3.0 and later:
<b><a href="postconf.5.html#smtp_tls_wrappermode">smtp_tls_wrappermode</a> (no)</b>
- Request that the Postfix SMTP client connects using the legacy
+ Request that the Postfix SMTP client connects using the legacy
SMTPS protocol instead of using the STARTTLS command.
Available in Postfix version 3.1 and later:
<b><a href="postconf.5.html#smtp_tls_dane_insecure_mx_policy">smtp_tls_dane_insecure_mx_policy</a> (see 'postconf -d' output)</b>
- The TLS policy for MX hosts with "secure" TLSA records when the
- nexthop destination security level is <b>dane</b>, but the MX record
+ The TLS policy for MX hosts with "secure" TLSA records when the
+ nexthop destination security level is <b>dane</b>, but the MX record
was found via an "insecure" MX lookup.
Available in Postfix version 3.4 and later:
Try to make multiple deliveries per TLS-encrypted connection.
<b><a href="postconf.5.html#smtp_tls_chain_files">smtp_tls_chain_files</a> (empty)</b>
- List of one or more PEM files, each holding one or more private
+ List of one or more PEM files, each holding one or more private
keys directly followed by a corresponding certificate chain.
<b><a href="postconf.5.html#smtp_tls_servername">smtp_tls_servername</a> (empty)</b>
- Optional name to send to the remote SMTP server in the TLS
+ Optional name to send to the remote SMTP server in the TLS
Server Name Indication (SNI) extension.
Available in Postfix 3.5, 3.4.6, 3.3.5, 3.2.10, 3.1.13 and later:
<b><a href="postconf.5.html#tls_fast_shutdown_enable">tls_fast_shutdown_enable</a> (yes)</b>
- A workaround for implementations that hang Postfix while shut-
+ A workaround for implementations that hang Postfix while shut-
ting down a TLS session, until Postfix times out.
<b>OBSOLETE STARTTLS CONTROLS</b>
- The following configuration parameters exist for compatibility with
- Postfix versions before 2.3. Support for these will be removed in a
+ The following configuration parameters exist for compatibility with
+ Postfix versions before 2.3. Support for these will be removed in a
future release.
<b><a href="postconf.5.html#smtp_use_tls">smtp_use_tls</a> (no)</b>
- Opportunistic mode: use TLS when a remote SMTP server announces
+ Opportunistic mode: use TLS when a remote SMTP server announces
STARTTLS support, otherwise send the mail in the clear.
<b><a href="postconf.5.html#smtp_enforce_tls">smtp_enforce_tls</a> (no)</b>
- Enforcement mode: require that remote SMTP servers use TLS
+ Enforcement mode: require that remote SMTP servers use TLS
encryption, and never send mail in the clear.
<b><a href="postconf.5.html#smtp_tls_enforce_peername">smtp_tls_enforce_peername</a> (yes)</b>
- With mandatory TLS encryption, require that the remote SMTP
- server hostname matches the information in the remote SMTP
+ With mandatory TLS encryption, require that the remote SMTP
+ server hostname matches the information in the remote SMTP
server certificate.
<b><a href="postconf.5.html#smtp_tls_per_site">smtp_tls_per_site</a> (empty)</b>
- Optional lookup tables with the Postfix SMTP client TLS usage
- policy by next-hop destination and by remote SMTP server host-
+ Optional lookup tables with the Postfix SMTP client TLS usage
+ policy by next-hop destination and by remote SMTP server host-
name.
<b><a href="postconf.5.html#smtp_tls_cipherlist">smtp_tls_cipherlist</a> (empty)</b>
- Obsolete Postfix < 2.3 control for the Postfix SMTP client TLS
+ Obsolete Postfix < 2.3 control for the Postfix SMTP client TLS
cipher list.
<b>RESOURCE AND RATE CONTROLS</b>
<b><a href="postconf.5.html#smtp_connect_timeout">smtp_connect_timeout</a> (30s)</b>
- The Postfix SMTP client time limit for completing a TCP connec-
+ The Postfix SMTP client time limit for completing a TCP connec-
tion, or zero (use the operating system built-in time limit).
<b><a href="postconf.5.html#smtp_helo_timeout">smtp_helo_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the HELO or EHLO
- command, and for receiving the initial remote SMTP server
+ The Postfix SMTP client time limit for sending the HELO or EHLO
+ command, and for receiving the initial remote SMTP server
response.
<b><a href="postconf.5.html#lmtp_lhlo_timeout">lmtp_lhlo_timeout</a> (300s)</b>
mand, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_mail_timeout">smtp_mail_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the MAIL FROM
+ The Postfix SMTP client time limit for sending the MAIL FROM
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_rcpt_timeout">smtp_rcpt_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the SMTP RCPT TO
+ The Postfix SMTP client time limit for sending the SMTP RCPT TO
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_data_init_timeout">smtp_data_init_timeout</a> (120s)</b>
- The Postfix SMTP client time limit for sending the SMTP DATA
+ The Postfix SMTP client time limit for sending the SMTP DATA
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_data_xfer_timeout">smtp_data_xfer_timeout</a> (180s)</b>
- The Postfix SMTP client time limit for sending the SMTP message
+ The Postfix SMTP client time limit for sending the SMTP message
content.
<b><a href="postconf.5.html#smtp_data_done_timeout">smtp_data_done_timeout</a> (600s)</b>
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtp_mx_address_limit">smtp_mx_address_limit</a> (5)</b>
- The maximal number of MX (mail exchanger) IP addresses that can
- result from Postfix SMTP client mail exchanger lookups, or zero
+ The maximal number of MX (mail exchanger) IP addresses that can
+ result from Postfix SMTP client mail exchanger lookups, or zero
(no limit).
<b><a href="postconf.5.html#smtp_mx_session_limit">smtp_mx_session_limit</a> (2)</b>
- The maximal number of SMTP sessions per delivery request before
- the Postfix SMTP client gives up or delivers to a fall-back
+ The maximal number of SMTP sessions per delivery request before
+ the Postfix SMTP client gives up or delivers to a fall-back
<a href="postconf.5.html#relayhost">relay host</a>, or zero (no limit).
<b><a href="postconf.5.html#smtp_rset_timeout">smtp_rset_timeout</a> (20s)</b>
Available in Postfix version 2.2 and earlier:
<b><a href="postconf.5.html#lmtp_cache_connection">lmtp_cache_connection</a> (yes)</b>
- Keep
Postfix LMTP client connections open for up to $<a href="postconf.5.html#max_idle">max_idle</a>
+ Keep
Postfix LMTP client connections open for up to $<a href="postconf.5.html#max_idle">max_idle</a>
seconds.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtp_connection_cache_destinations">smtp_connection_cache_destinations</a> (empty)</b>
- Permanently enable SMTP connection caching for the specified
+ Permanently enable SMTP connection caching for the specified
destinations.
<b><a href="postconf.5.html#smtp_connection_cache_on_demand">smtp_connection_cache_on_demand</a> (yes)</b>
- Temporarily enable SMTP connection caching while a destination
+ Temporarily enable SMTP connection caching while a destination
has a high volume of mail in the <a href="QSHAPE_README.html#active_queue">active queue</a>.
<b><a href="postconf.5.html#smtp_connection_reuse_time_limit">smtp_connection_reuse_time_limit</a> (300s)</b>
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#connection_cache_protocol_timeout">connection_cache_protocol_timeout</a> (5s)</b>
- Time limit for connection cache connect, send or receive opera-
+ Time limit for connection cache connect, send or receive opera-
tions.
Available in Postfix version 2.9 and later:
<b><a href="postconf.5.html#smtp_per_record_deadline">smtp_per_record_deadline</a> (no)</b>
- Change the behavior of the smtp_*_timeout time limits, from a
- time limit per read or write system call, to a time limit to
- send or receive a complete record (an SMTP command line, SMTP
- response line, SMTP message content line, or TLS protocol mes-
+ Change the behavior of the smtp_*_timeout time limits, from a
+ time limit per read or write system call, to a time limit to
+ send or receive a complete record (an SMTP command line, SMTP
+ response line, SMTP message content line, or TLS protocol mes-
sage).
Available in Postfix version 2.11 and later:
<b><a href="postconf.5.html#smtp_connection_reuse_count_limit">smtp_connection_reuse_count_limit</a> (0)</b>
- When SMTP connection caching is enabled, the number of times
- that an SMTP session may be reused before it is closed, or zero
+ When SMTP connection caching is enabled, the number of times
+ that an SMTP session may be reused before it is closed, or zero
(no limit).
Available in Postfix version 3.4 and later:
<b>transport_destination_concurrency_limit ($<a href="postconf.5.html#default_destination_concurrency_limit">default_destination_concur</a>-</b>
<b><a href="postconf.5.html#default_destination_concurrency_limit">rency_limit</a>)</b>
- A transport-specific override for the default_destination_con-
+ A transport-specific override for the default_destination_con-
currency_limit parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
name of the message delivery transport.
<b>transport_destination_recipient_limit ($<a href="postconf.5.html#default_destination_recipient_limit">default_destination_recipi</a>-</b>
<b><a href="postconf.5.html#default_destination_recipient_limit">ent_limit</a>)</b>
A transport-specific override for the <a href="postconf.5.html#default_destination_recipient_limit">default_destination_recip</a>-
- <a href="postconf.5.html#default_destination_recipient_limit">ient_limit</a>
parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
+ <a href="postconf.5.html#default_destination_recipient_limit">ient_limit</a>
parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
name of the message delivery transport.
<b>SMTPUTF8 CONTROLS</b>
Preliminary SMTPUTF8 support is introduced with Postfix 3.0.
<b><a href="postconf.5.html#smtputf8_enable">smtputf8_enable</a> (yes)</b>
- Enable preliminary SMTPUTF8 support for the protocols described
+ Enable preliminary SMTPUTF8 support for the protocols described
in <a href="http://tools.ietf.org/html/rfc6531">RFC 6531</a>..6533.
<b><a href="postconf.5.html#smtputf8_autodetect_classes">smtputf8_autodetect_classes</a> (sendmail, verify)</b>
- Detect that a message requires SMTPUTF8 support for the speci-
+ Detect that a message requires SMTPUTF8 support for the speci-
fied mail origin classes.
Available in Postfix version 3.2 and later:
<b><a href="postconf.5.html#enable_idna2003_compatibility">enable_idna2003_compatibility</a> (no)</b>
- Enable 'transitional' compatibility between IDNA2003 and
- IDNA2008, when converting UTF-8 domain names to/from the ASCII
+ Enable 'transitional' compatibility between IDNA2003 and
+ IDNA2008, when converting UTF-8 domain names to/from the ASCII
form that is used for DNS lookups.
<b>TROUBLE SHOOTING CONTROLS</b>
<b><a href="postconf.5.html#debug_peer_level">debug_peer_level</a> (2)</b>
- The increment in verbose logging level when a nexthop destina-
- tion, remote client or server name or network address matches a
+ The increment in verbose logging level when a nexthop destina-
+ tion, remote client or server name or network address matches a
pattern given with the <a href="postconf.5.html#debug_peer_list">debug_peer_list</a> parameter.
<b><a href="postconf.5.html#debug_peer_list">debug_peer_list</a> (empty)</b>
- Optional list of nexthop destination, remote client or server
- name or network address patterns that, if matched, cause the
- verbose logging level to increase by the amount specified in
+ Optional list of nexthop destination, remote client or server
+ name or network address patterns that, if matched, cause the
+ verbose logging level to increase by the amount specified in
$<a href="postconf.5.html#debug_peer_level">debug_peer_level</a>.
<b><a href="postconf.5.html#error_notice_recipient">error_notice_recipient</a> (postmaster)</b>
- The recipient of postmaster notifications about mail delivery
+ The recipient of postmaster notifications about mail delivery
problems that are caused by policy, resource, software or proto-
col errors.
<b><a href="postconf.5.html#internal_mail_filter_classes">internal_mail_filter_classes</a> (empty)</b>
- What categories of Postfix-generated mail are subject to
- before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
+ What categories of Postfix-generated mail are subject to
+ before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
<a href="postconf.5.html#header_checks">header_checks</a> and <a href="postconf.5.html#body_checks">body_checks</a>.
<b><a href="postconf.5.html#notify_classes">notify_classes</a> (resource, software)</b>
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#best_mx_transport">best_mx_transport</a> (empty)</b>
- Where the Postfix SMTP client should deliver mail when it
+ Where the Postfix SMTP client should deliver mail when it
detects a "mail loops back to myself" error condition.
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
- The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
+ The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
figuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
- How much time a Postfix daemon process may take to handle a
+ How much time a Postfix daemon process may take to handle a
request before it is terminated by a built-in watchdog timer.
<b><a href="postconf.5.html#delay_logging_resolution_limit">delay_logging_resolution_limit</a> (2)</b>
- The maximal number of digits after the decimal point when log-
+ The maximal number of digits after the decimal point when log-
ging sub-second delay values.
<b><a href="postconf.5.html#disable_dns_lookups">disable_dns_lookups</a> (no)</b>
Disable DNS lookups in the Postfix SMTP and LMTP clients.
<b><a href="postconf.5.html#inet_interfaces">inet_interfaces</a> (all)</b>
- The network interface addresses that this mail system receives
+ The network interface addresses that this mail system receives
mail on.
<b><a href="postconf.5.html#inet_protocols">inet_protocols</a> (see 'postconf -d output')</b>
- The Internet protocols Postfix will attempt to use when making
+ The Internet protocols Postfix will attempt to use when making
or accepting connections.
<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
- The time limit for sending or receiving information over an
+ The time limit for sending or receiving information over an
internal communication channel.
<b><a href="postconf.5.html#lmtp_assume_final">lmtp_assume_final</a> (no)</b>
- When a remote LMTP server announces no DSN support, assume that
- the server performs final delivery, and send "delivered" deliv-
+ When a remote LMTP server announces no DSN support, assume that
+ the server performs final delivery, and send "delivered" deliv-
ery status notifications instead of "relayed".
<b><a href="postconf.5.html#lmtp_tcp_port">lmtp_tcp_port</a> (24)</b>
The default TCP port that the Postfix LMTP client connects to.
<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
- The maximum amount of time that an idle Postfix daemon process
+ The maximum amount of time that an idle Postfix daemon process
waits for an incoming connection before terminating voluntarily.
<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
The process name of a Postfix command or daemon process.
<b><a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a> (empty)</b>
- The network interface addresses that this mail system receives
+ The network interface addresses that this mail system receives
mail on by way of a proxy or network address translation unit.
<b><a href="postconf.5.html#smtp_address_preference">smtp_address_preference</a> (any)</b>
The address type ("ipv6", "ipv4" or "any") that the Postfix SMTP
- client will try first, when a destination has IPv6 and IPv4
+ client will try first, when a destination has IPv6 and IPv4
addresses with equal MX preference.
<b><a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> (empty)</b>
- An optional numerical network address that the Postfix SMTP
+ An optional numerical network address that the Postfix SMTP
client should bind to when making an IPv4 connection.
<b><a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> (empty)</b>
- An optional numerical network address that the Postfix SMTP
+ An optional numerical network address that the Postfix SMTP
client should bind to when making an IPv6 connection.
<b><a href="postconf.5.html#smtp_helo_name">smtp_helo_name</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
- A prefix that is prepended to the process name in syslog
+ A prefix that is prepended to the process name in syslog
records, so that, for example, "smtpd" becomes "prefix/smtpd".
Available with Postfix 2.2 and earlier:
Available with Postfix 3.0 and later:
<b><a href="postconf.5.html#smtp_address_verify_target">smtp_address_verify_target</a> (rcpt)</b>
- In the context of email address verification, the SMTP protocol
+ In the context of email address verification, the SMTP protocol
stage that determines whether an email address is deliverable.
Available with Postfix 3.1 and later:
<b><a href="postconf.5.html#service_name">service_name</a> (read-only)</b>
The <a href="master.5.html">master.cf</a> service name of a Postfix daemon process.
+ Available in Postfix 3.6 and later:
+
+ <b>known_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submis-</b>
+ <b>sion=587)</b>
+ Optional setting that avoids lookups in the <b>services</b>(5) data-
+ base.
+
<b>FILES</b>
- To expand the directory names below into their actual values, use the
+ To expand the directory names below into their actual values, use the
command "<b>postconf <a href="postconf.5.html#config_directory">config_directory</a></b>" etc.
$<a href="postconf.5.html#config_directory">config_directory</a>/<a href="postconf.5.html">main.cf</a>, global configuration file.
</p>
+</DD>
+
+<DT><b><a name="known_tcp_ports">known_tcp_ports</a>
+(default: lmtp=24, smtp=25, smtps=submissions=465, submission=587)</b></DT><DD>
+
+<p> Optional setting that avoids lookups in the services(5) database.
+This feature was implemented to address inconsistencies in the name
+of the port "465" service. The ABNF is:
+</p>
+
+<blockquote>
+<p>
+known_tcp_ports = empty | name-to-port *("," name-to-port) <br>
+name-to-port = 1*(service-name "=') port-number
+</p>
+</blockquote>
+
+<p> Whitespace is optional but it cannot appear inside a service
+name or port number. </p>
+
+<p> This feature is available in Postfix 3.6 and later. </p>
+
+
</DD>
<DT><b><a name="line_length_limit">line_length_limit</a>
".") that Postfix may use to determine whether DNSSEC validation
is available.
+ <b>known_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submis-</b>
+ <b>sion=587)</b>
+ Optional setting that avoids lookups in the <b>services</b>(5) data-
+ base.
+
<b>MIME PROCESSING CONTROLS</b>
Available in Postfix version 2.0 and later:
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtp_send_xforward_command">smtp_send_xforward_command</a> (no)</b>
- Send the non-standard XFORWARD command when the Postfix SMTP
+ Send the non-standard XFORWARD command when the Postfix SMTP
server EHLO response announces XFORWARD support.
<b>SASL AUTHENTICATION CONTROLS</b>
Enable SASL authentication in the Postfix SMTP client.
<b><a href="postconf.5.html#smtp_sasl_password_maps">smtp_sasl_password_maps</a> (empty)</b>
- Optional Postfix SMTP client lookup tables with one user-
- name:password entry per sender, remote hostname or next-hop
+ Optional Postfix SMTP client lookup tables with one user-
+ name:password entry per sender, remote hostname or next-hop
domain.
<b><a href="postconf.5.html#smtp_sasl_security_options">smtp_sasl_security_options</a> (noplaintext, noanonymous)</b>
Postfix SMTP client SASL security options; as of Postfix 2.3 the
- list of available features depends on the SASL client implemen-
+ list of available features depends on the SASL client implemen-
tation that is selected with <b><a href="postconf.5.html#smtp_sasl_type">smtp_sasl_type</a></b>.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtp_sasl_mechanism_filter">smtp_sasl_mechanism_filter</a> (empty)</b>
- If non-empty, a Postfix SMTP client filter for the remote SMTP
+ If non-empty, a Postfix SMTP client filter for the remote SMTP
server's list of offered SASL mechanisms.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#smtp_sender_dependent_authentication">smtp_sender_dependent_authentication</a> (no)</b>
Enable sender-dependent authentication in the Postfix SMTP
- client; this is available only with SASL authentication, and
- disables SMTP connection caching to ensure that mail from dif-
+ client; this is available only with SASL authentication, and
+ disables SMTP connection caching to ensure that mail from dif-
ferent senders will use the appropriate credentials.
<b><a href="postconf.5.html#smtp_sasl_path">smtp_sasl_path</a> (empty)</b>
Implementation-specific information that the Postfix SMTP client
- passes through to the SASL plug-in implementation that is
+ passes through to the SASL plug-in implementation that is
selected with <b><a href="postconf.5.html#smtp_sasl_type">smtp_sasl_type</a></b>.
<b><a href="postconf.5.html#smtp_sasl_type">smtp_sasl_type</a> (cyrus)</b>
- The SASL plug-in type that the Postfix SMTP client should use
+ The SASL plug-in type that the Postfix SMTP client should use
for authentication.
Available in Postfix version 2.5 and later:
<b><a href="postconf.5.html#smtp_sasl_auth_cache_name">smtp_sasl_auth_cache_name</a> (empty)</b>
- An optional table to prevent repeated SASL authentication fail-
- ures with the same remote SMTP server hostname, username and
+ An optional table to prevent repeated SASL authentication fail-
+ ures with the same remote SMTP server hostname, username and
password.
<b><a href="postconf.5.html#smtp_sasl_auth_cache_time">smtp_sasl_auth_cache_time</a> (90d)</b>
- The maximal age of an <a href="postconf.5.html#smtp_sasl_auth_cache_name">smtp_sasl_auth_cache_name</a> entry before it
+ The maximal age of an <a href="postconf.5.html#smtp_sasl_auth_cache_name">smtp_sasl_auth_cache_name</a> entry before it
is removed.
<b><a href="postconf.5.html#smtp_sasl_auth_soft_bounce">smtp_sasl_auth_soft_bounce</a> (yes)</b>
- When a remote SMTP server rejects a SASL authentication request
- with a 535 reply code, defer mail delivery instead of returning
+ When a remote SMTP server rejects a SASL authentication request
+ with a 535 reply code, defer mail delivery instead of returning
mail as undeliverable.
Available in Postfix version 2.9 and later:
<b><a href="postconf.5.html#smtp_send_dummy_mail_auth">smtp_send_dummy_mail_auth</a> (no)</b>
- Whether or not to append the "AUTH=<>" option to the MAIL FROM
+ Whether or not to append the "AUTH=<>" option to the MAIL FROM
command in SASL-authenticated SMTP sessions.
<b>STARTTLS SUPPORT CONTROLS</b>
- Detailed information about STARTTLS configuration may be found in the
+ Detailed information about STARTTLS configuration may be found in the
<a href="TLS_README.html">TLS_README</a> document.
<b><a href="postconf.5.html#smtp_tls_security_level">smtp_tls_security_level</a> (empty)</b>
<a href="postconf.5.html#smtp_tls_enforce_peername">smtp_tls_enforce_peername</a>.
<b><a href="postconf.5.html#smtp_sasl_tls_security_options">smtp_sasl_tls_security_options</a> ($<a href="postconf.5.html#smtp_sasl_security_options">smtp_sasl_security_options</a>)</b>
- The SASL authentication security options that the Postfix SMTP
+ The SASL authentication security options that the Postfix SMTP
client uses for TLS encrypted SMTP sessions.
<b><a href="postconf.5.html#smtp_starttls_timeout">smtp_starttls_timeout</a> (300s)</b>
- Time limit for Postfix SMTP client write and read operations
+ Time limit for Postfix SMTP client write and read operations
during TLS startup and shutdown handshake procedures.
<b><a href="postconf.5.html#smtp_tls_CAfile">smtp_tls_CAfile</a> (empty)</b>
- A file containing CA certificates of root CAs trusted to sign
- either remote SMTP server certificates or intermediate CA cer-
+ A file containing CA certificates of root CAs trusted to sign
+ either remote SMTP server certificates or intermediate CA cer-
tificates.
<b><a href="postconf.5.html#smtp_tls_CApath">smtp_tls_CApath</a> (empty)</b>
- Directory with PEM format Certification Authority certificates
+ Directory with PEM format Certification Authority certificates
that the Postfix SMTP client uses to verify a remote SMTP server
certificate.
File with the Postfix SMTP client RSA certificate in PEM format.
<b><a href="postconf.5.html#smtp_tls_mandatory_ciphers">smtp_tls_mandatory_ciphers</a> (medium)</b>
- The minimum TLS cipher grade that the Postfix SMTP client will
+ The minimum TLS cipher grade that the Postfix SMTP client will
use with mandatory TLS encryption.
<b><a href="postconf.5.html#smtp_tls_exclude_ciphers">smtp_tls_exclude_ciphers</a> (empty)</b>
client cipher list at all TLS security levels.
<b><a href="postconf.5.html#smtp_tls_mandatory_exclude_ciphers">smtp_tls_mandatory_exclude_ciphers</a> (empty)</b>
- Additional list of ciphers or cipher types to exclude from the
- Postfix SMTP client cipher list at mandatory TLS security lev-
+ Additional list of ciphers or cipher types to exclude from the
+ Postfix SMTP client cipher list at mandatory TLS security lev-
els.
<b><a href="postconf.5.html#smtp_tls_dcert_file">smtp_tls_dcert_file</a> (empty)</b>
Enable additional Postfix SMTP client logging of TLS activity.
<b><a href="postconf.5.html#smtp_tls_note_starttls_offer">smtp_tls_note_starttls_offer</a> (no)</b>
- Log the hostname of a remote SMTP server that offers STARTTLS,
+ Log the hostname of a remote SMTP server that offers STARTTLS,
when TLS is not already enabled for that server.
<b><a href="postconf.5.html#smtp_tls_policy_maps">smtp_tls_policy_maps</a> (empty)</b>
fied, this overrides the obsolete <a href="postconf.5.html#smtp_tls_per_site">smtp_tls_per_site</a> parameter.
<b><a href="postconf.5.html#smtp_tls_mandatory_protocols">smtp_tls_mandatory_protocols</a> (see 'postconf -d' output)</b>
- TLS protocols that the Postfix SMTP client will use with manda-
+ TLS protocols that the Postfix SMTP client will use with manda-
tory TLS encryption.
<b><a href="postconf.5.html#smtp_tls_scert_verifydepth">smtp_tls_scert_verifydepth</a> (9)</b>
The verification depth for remote SMTP server certificates.
<b><a href="postconf.5.html#smtp_tls_secure_cert_match">smtp_tls_secure_cert_match</a> (nexthop, dot-nexthop)</b>
- How the Postfix SMTP client verifies the server certificate
+ How the Postfix SMTP client verifies the server certificate
peername for the "secure" TLS security level.
<b><a href="postconf.5.html#smtp_tls_session_cache_database">smtp_tls_session_cache_database</a> (empty)</b>
session cache.
<b><a href="postconf.5.html#smtp_tls_session_cache_timeout">smtp_tls_session_cache_timeout</a> (3600s)</b>
- The expiration time of Postfix SMTP client TLS session cache
+ The expiration time of Postfix SMTP client TLS session cache
information.
<b><a href="postconf.5.html#smtp_tls_verify_cert_match">smtp_tls_verify_cert_match</a> (hostname)</b>
- How the Postfix SMTP client verifies the server certificate
+ How the Postfix SMTP client verifies the server certificate
peername for the "verify" TLS security level.
<b><a href="postconf.5.html#tls_daemon_random_bytes">tls_daemon_random_bytes</a> (32)</b>
- The
number of pseudo-random bytes that an <a href="smtp.8.html"><b>smtp</b>(8)</a> or <a href="smtpd.8.html"><b>smtpd</b>(8)</a>
- process requests from the <a href="tlsmgr.8.html"><b>tlsmgr</b>(8)</a> server in order to seed its
+ The
number of pseudo-random bytes that an <a href="smtp.8.html"><b>smtp</b>(8)</a> or <a href="smtpd.8.html"><b>smtpd</b>(8)</a>
+ process requests from the <a href="tlsmgr.8.html"><b>tlsmgr</b>(8)</a> server in order to seed its
internal pseudo random number generator (PRNG).
<b><a href="postconf.5.html#tls_high_cipherlist">tls_high_cipherlist</a> (see 'postconf -d' output)</b>
The OpenSSL cipherlist for "export" or higher grade ciphers.
<b><a href="postconf.5.html#tls_null_cipherlist">tls_null_cipherlist</a> (eNULL:!aNULL)</b>
- The OpenSSL cipherlist for "NULL" grade ciphers that provide
+ The OpenSSL cipherlist for "NULL" grade ciphers that provide
authentication without encryption.
Available in Postfix version 2.4 and later:
<b><a href="postconf.5.html#smtp_sasl_tls_verified_security_options">smtp_sasl_tls_verified_security_options</a> ($<a href="postconf.5.html#smtp_sasl_tls_security_options">smtp_sasl_tls_secu</a>-</b>
<b><a href="postconf.5.html#smtp_sasl_tls_security_options">rity_options</a>)</b>
- The SASL authentication security options that the Postfix SMTP
- client uses for TLS encrypted SMTP sessions with a verified
+ The SASL authentication security options that the Postfix SMTP
+ client uses for TLS encrypted SMTP sessions with a verified
server certificate.
Available in Postfix version 2.5 and later:
<b><a href="postconf.5.html#smtp_tls_fingerprint_cert_match">smtp_tls_fingerprint_cert_match</a> (empty)</b>
- List of acceptable remote SMTP server certificate fingerprints
- for
the "fingerprint" TLS security level (<b><a href="postconf.5.html#smtp_tls_security_level">smtp_tls_secu</a>-</b>
+ List of acceptable remote SMTP server certificate fingerprints
+ for
the "fingerprint" TLS security level (<b><a href="postconf.5.html#smtp_tls_security_level">smtp_tls_secu</a>-</b>
<b><a href="postconf.5.html#smtp_tls_security_level">rity_level</a></b> = fingerprint).
<b><a href="postconf.5.html#smtp_tls_fingerprint_digest">smtp_tls_fingerprint_digest</a> (see 'postconf -d' output)</b>
- The message digest algorithm used to construct remote SMTP
+ The message digest algorithm used to construct remote SMTP
server certificate fingerprints.
Available in Postfix version 2.6 and later:
<b><a href="postconf.5.html#smtp_tls_protocols">smtp_tls_protocols</a> (see postconf -d output)</b>
- TLS protocols that the Postfix SMTP client will use with oppor-
+ TLS protocols that the Postfix SMTP client will use with oppor-
tunistic TLS encryption.
<b><a href="postconf.5.html#smtp_tls_ciphers">smtp_tls_ciphers</a> (medium)</b>
- The minimum TLS cipher grade that the Postfix SMTP client will
+ The minimum TLS cipher grade that the Postfix SMTP client will
use with opportunistic TLS encryption.
<b><a href="postconf.5.html#smtp_tls_eccert_file">smtp_tls_eccert_file</a> (empty)</b>
- File with the Postfix SMTP client ECDSA certificate in PEM for-
+ File with the Postfix SMTP client ECDSA certificate in PEM for-
mat.
<b><a href="postconf.5.html#smtp_tls_eckey_file">smtp_tls_eckey_file</a> ($<a href="postconf.5.html#smtp_tls_eccert_file">smtp_tls_eccert_file</a>)</b>
- File with the Postfix SMTP client ECDSA private key in PEM for-
+ File with the Postfix SMTP client ECDSA private key in PEM for-
mat.
Available in Postfix version 2.7 and later:
<b><a href="postconf.5.html#smtp_tls_block_early_mail_reply">smtp_tls_block_early_mail_reply</a> (no)</b>
- Try to detect a mail hijacking attack based on a TLS protocol
- vulnerability (CVE-2009-3555), where an attacker prepends mali-
- cious HELO, MAIL, RCPT, DATA commands to a Postfix SMTP client
+ Try to detect a mail hijacking attack based on a TLS protocol
+ vulnerability (CVE-2009-3555), where an attacker prepends mali-
+ cious HELO, MAIL, RCPT, DATA commands to a Postfix SMTP client
TLS session.
Available in Postfix version 2.8 and later:
Available in Postfix version 2.11 and later:
<b><a href="postconf.5.html#smtp_tls_trust_anchor_file">smtp_tls_trust_anchor_file</a> (empty)</b>
- Zero or more PEM-format files with trust-anchor certificates
+ Zero or more PEM-format files with trust-anchor certificates
and/or public keys.
<b><a href="postconf.5.html#smtp_tls_force_insecure_host_tlsa_lookup">smtp_tls_force_insecure_host_tlsa_lookup</a> (no)</b>
- Lookup the associated DANE TLSA RRset even when a hostname is
+ Lookup the associated DANE TLSA RRset even when a hostname is
not an alias and its address records lie in an unsigned zone.
<b><a href="postconf.5.html#tlsmgr_service_name">tlsmgr_service_name</a> (tlsmgr)</b>
Available in Postfix version 3.0 and later:
<b><a href="postconf.5.html#smtp_tls_wrappermode">smtp_tls_wrappermode</a> (no)</b>
- Request that the Postfix SMTP client connects using the legacy
+ Request that the Postfix SMTP client connects using the legacy
SMTPS protocol instead of using the STARTTLS command.
Available in Postfix version 3.1 and later:
<b><a href="postconf.5.html#smtp_tls_dane_insecure_mx_policy">smtp_tls_dane_insecure_mx_policy</a> (see 'postconf -d' output)</b>
- The TLS policy for MX hosts with "secure" TLSA records when the
- nexthop destination security level is <b>dane</b>, but the MX record
+ The TLS policy for MX hosts with "secure" TLSA records when the
+ nexthop destination security level is <b>dane</b>, but the MX record
was found via an "insecure" MX lookup.
Available in Postfix version 3.4 and later:
Try to make multiple deliveries per TLS-encrypted connection.
<b><a href="postconf.5.html#smtp_tls_chain_files">smtp_tls_chain_files</a> (empty)</b>
- List of one or more PEM files, each holding one or more private
+ List of one or more PEM files, each holding one or more private
keys directly followed by a corresponding certificate chain.
<b><a href="postconf.5.html#smtp_tls_servername">smtp_tls_servername</a> (empty)</b>
- Optional name to send to the remote SMTP server in the TLS
+ Optional name to send to the remote SMTP server in the TLS
Server Name Indication (SNI) extension.
Available in Postfix 3.5, 3.4.6, 3.3.5, 3.2.10, 3.1.13 and later:
<b><a href="postconf.5.html#tls_fast_shutdown_enable">tls_fast_shutdown_enable</a> (yes)</b>
- A workaround for implementations that hang Postfix while shut-
+ A workaround for implementations that hang Postfix while shut-
ting down a TLS session, until Postfix times out.
<b>OBSOLETE STARTTLS CONTROLS</b>
- The following configuration parameters exist for compatibility with
- Postfix versions before 2.3. Support for these will be removed in a
+ The following configuration parameters exist for compatibility with
+ Postfix versions before 2.3. Support for these will be removed in a
future release.
<b><a href="postconf.5.html#smtp_use_tls">smtp_use_tls</a> (no)</b>
- Opportunistic mode: use TLS when a remote SMTP server announces
+ Opportunistic mode: use TLS when a remote SMTP server announces
STARTTLS support, otherwise send the mail in the clear.
<b><a href="postconf.5.html#smtp_enforce_tls">smtp_enforce_tls</a> (no)</b>
- Enforcement mode: require that remote SMTP servers use TLS
+ Enforcement mode: require that remote SMTP servers use TLS
encryption, and never send mail in the clear.
<b><a href="postconf.5.html#smtp_tls_enforce_peername">smtp_tls_enforce_peername</a> (yes)</b>
- With mandatory TLS encryption, require that the remote SMTP
- server hostname matches the information in the remote SMTP
+ With mandatory TLS encryption, require that the remote SMTP
+ server hostname matches the information in the remote SMTP
server certificate.
<b><a href="postconf.5.html#smtp_tls_per_site">smtp_tls_per_site</a> (empty)</b>
- Optional lookup tables with the Postfix SMTP client TLS usage
- policy by next-hop destination and by remote SMTP server host-
+ Optional lookup tables with the Postfix SMTP client TLS usage
+ policy by next-hop destination and by remote SMTP server host-
name.
<b><a href="postconf.5.html#smtp_tls_cipherlist">smtp_tls_cipherlist</a> (empty)</b>
- Obsolete Postfix < 2.3 control for the Postfix SMTP client TLS
+ Obsolete Postfix < 2.3 control for the Postfix SMTP client TLS
cipher list.
<b>RESOURCE AND RATE CONTROLS</b>
<b><a href="postconf.5.html#smtp_connect_timeout">smtp_connect_timeout</a> (30s)</b>
- The Postfix SMTP client time limit for completing a TCP connec-
+ The Postfix SMTP client time limit for completing a TCP connec-
tion, or zero (use the operating system built-in time limit).
<b><a href="postconf.5.html#smtp_helo_timeout">smtp_helo_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the HELO or EHLO
- command, and for receiving the initial remote SMTP server
+ The Postfix SMTP client time limit for sending the HELO or EHLO
+ command, and for receiving the initial remote SMTP server
response.
<b><a href="postconf.5.html#lmtp_lhlo_timeout">lmtp_lhlo_timeout</a> (300s)</b>
mand, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_mail_timeout">smtp_mail_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the MAIL FROM
+ The Postfix SMTP client time limit for sending the MAIL FROM
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_rcpt_timeout">smtp_rcpt_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the SMTP RCPT TO
+ The Postfix SMTP client time limit for sending the SMTP RCPT TO
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_data_init_timeout">smtp_data_init_timeout</a> (120s)</b>
- The Postfix SMTP client time limit for sending the SMTP DATA
+ The Postfix SMTP client time limit for sending the SMTP DATA
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_data_xfer_timeout">smtp_data_xfer_timeout</a> (180s)</b>
- The Postfix SMTP client time limit for sending the SMTP message
+ The Postfix SMTP client time limit for sending the SMTP message
content.
<b><a href="postconf.5.html#smtp_data_done_timeout">smtp_data_done_timeout</a> (600s)</b>
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtp_mx_address_limit">smtp_mx_address_limit</a> (5)</b>
- The maximal number of MX (mail exchanger) IP addresses that can
- result from Postfix SMTP client mail exchanger lookups, or zero
+ The maximal number of MX (mail exchanger) IP addresses that can
+ result from Postfix SMTP client mail exchanger lookups, or zero
(no limit).
<b><a href="postconf.5.html#smtp_mx_session_limit">smtp_mx_session_limit</a> (2)</b>
- The maximal number of SMTP sessions per delivery request before
- the Postfix SMTP client gives up or delivers to a fall-back
+ The maximal number of SMTP sessions per delivery request before
+ the Postfix SMTP client gives up or delivers to a fall-back
<a href="postconf.5.html#relayhost">relay host</a>, or zero (no limit).
<b><a href="postconf.5.html#smtp_rset_timeout">smtp_rset_timeout</a> (20s)</b>
Available in Postfix version 2.2 and earlier:
<b><a href="postconf.5.html#lmtp_cache_connection">lmtp_cache_connection</a> (yes)</b>
- Keep
Postfix LMTP client connections open for up to $<a href="postconf.5.html#max_idle">max_idle</a>
+ Keep
Postfix LMTP client connections open for up to $<a href="postconf.5.html#max_idle">max_idle</a>
seconds.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtp_connection_cache_destinations">smtp_connection_cache_destinations</a> (empty)</b>
- Permanently enable SMTP connection caching for the specified
+ Permanently enable SMTP connection caching for the specified
destinations.
<b><a href="postconf.5.html#smtp_connection_cache_on_demand">smtp_connection_cache_on_demand</a> (yes)</b>
- Temporarily enable SMTP connection caching while a destination
+ Temporarily enable SMTP connection caching while a destination
has a high volume of mail in the <a href="QSHAPE_README.html#active_queue">active queue</a>.
<b><a href="postconf.5.html#smtp_connection_reuse_time_limit">smtp_connection_reuse_time_limit</a> (300s)</b>
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#connection_cache_protocol_timeout">connection_cache_protocol_timeout</a> (5s)</b>
- Time limit for connection cache connect, send or receive opera-
+ Time limit for connection cache connect, send or receive opera-
tions.
Available in Postfix version 2.9 and later:
<b><a href="postconf.5.html#smtp_per_record_deadline">smtp_per_record_deadline</a> (no)</b>
- Change the behavior of the smtp_*_timeout time limits, from a
- time limit per read or write system call, to a time limit to
- send or receive a complete record (an SMTP command line, SMTP
- response line, SMTP message content line, or TLS protocol mes-
+ Change the behavior of the smtp_*_timeout time limits, from a
+ time limit per read or write system call, to a time limit to
+ send or receive a complete record (an SMTP command line, SMTP
+ response line, SMTP message content line, or TLS protocol mes-
sage).
Available in Postfix version 2.11 and later:
<b><a href="postconf.5.html#smtp_connection_reuse_count_limit">smtp_connection_reuse_count_limit</a> (0)</b>
- When SMTP connection caching is enabled, the number of times
- that an SMTP session may be reused before it is closed, or zero
+ When SMTP connection caching is enabled, the number of times
+ that an SMTP session may be reused before it is closed, or zero
(no limit).
Available in Postfix version 3.4 and later:
<b>transport_destination_concurrency_limit ($<a href="postconf.5.html#default_destination_concurrency_limit">default_destination_concur</a>-</b>
<b><a href="postconf.5.html#default_destination_concurrency_limit">rency_limit</a>)</b>
- A transport-specific override for the default_destination_con-
+ A transport-specific override for the default_destination_con-
currency_limit parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
name of the message delivery transport.
<b>transport_destination_recipient_limit ($<a href="postconf.5.html#default_destination_recipient_limit">default_destination_recipi</a>-</b>
<b><a href="postconf.5.html#default_destination_recipient_limit">ent_limit</a>)</b>
A transport-specific override for the <a href="postconf.5.html#default_destination_recipient_limit">default_destination_recip</a>-
- <a href="postconf.5.html#default_destination_recipient_limit">ient_limit</a>
parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
+ <a href="postconf.5.html#default_destination_recipient_limit">ient_limit</a>
parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
name of the message delivery transport.
<b>SMTPUTF8 CONTROLS</b>
Preliminary SMTPUTF8 support is introduced with Postfix 3.0.
<b><a href="postconf.5.html#smtputf8_enable">smtputf8_enable</a> (yes)</b>
- Enable preliminary SMTPUTF8 support for the protocols described
+ Enable preliminary SMTPUTF8 support for the protocols described
in <a href="http://tools.ietf.org/html/rfc6531">RFC 6531</a>..6533.
<b><a href="postconf.5.html#smtputf8_autodetect_classes">smtputf8_autodetect_classes</a> (sendmail, verify)</b>
- Detect that a message requires SMTPUTF8 support for the speci-
+ Detect that a message requires SMTPUTF8 support for the speci-
fied mail origin classes.
Available in Postfix version 3.2 and later:
<b><a href="postconf.5.html#enable_idna2003_compatibility">enable_idna2003_compatibility</a> (no)</b>
- Enable 'transitional' compatibility between IDNA2003 and
- IDNA2008, when converting UTF-8 domain names to/from the ASCII
+ Enable 'transitional' compatibility between IDNA2003 and
+ IDNA2008, when converting UTF-8 domain names to/from the ASCII
form that is used for DNS lookups.
<b>TROUBLE SHOOTING CONTROLS</b>
<b><a href="postconf.5.html#debug_peer_level">debug_peer_level</a> (2)</b>
- The increment in verbose logging level when a nexthop destina-
- tion, remote client or server name or network address matches a
+ The increment in verbose logging level when a nexthop destina-
+ tion, remote client or server name or network address matches a
pattern given with the <a href="postconf.5.html#debug_peer_list">debug_peer_list</a> parameter.
<b><a href="postconf.5.html#debug_peer_list">debug_peer_list</a> (empty)</b>
- Optional list of nexthop destination, remote client or server
- name or network address patterns that, if matched, cause the
- verbose logging level to increase by the amount specified in
+ Optional list of nexthop destination, remote client or server
+ name or network address patterns that, if matched, cause the
+ verbose logging level to increase by the amount specified in
$<a href="postconf.5.html#debug_peer_level">debug_peer_level</a>.
<b><a href="postconf.5.html#error_notice_recipient">error_notice_recipient</a> (postmaster)</b>
- The recipient of postmaster notifications about mail delivery
+ The recipient of postmaster notifications about mail delivery
problems that are caused by policy, resource, software or proto-
col errors.
<b><a href="postconf.5.html#internal_mail_filter_classes">internal_mail_filter_classes</a> (empty)</b>
- What categories of Postfix-generated mail are subject to
- before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
+ What categories of Postfix-generated mail are subject to
+ before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
<a href="postconf.5.html#header_checks">header_checks</a> and <a href="postconf.5.html#body_checks">body_checks</a>.
<b><a href="postconf.5.html#notify_classes">notify_classes</a> (resource, software)</b>
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#best_mx_transport">best_mx_transport</a> (empty)</b>
- Where the Postfix SMTP client should deliver mail when it
+ Where the Postfix SMTP client should deliver mail when it
detects a "mail loops back to myself" error condition.
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
- The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
+ The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
figuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
- How much time a Postfix daemon process may take to handle a
+ How much time a Postfix daemon process may take to handle a
request before it is terminated by a built-in watchdog timer.
<b><a href="postconf.5.html#delay_logging_resolution_limit">delay_logging_resolution_limit</a> (2)</b>
- The maximal number of digits after the decimal point when log-
+ The maximal number of digits after the decimal point when log-
ging sub-second delay values.
<b><a href="postconf.5.html#disable_dns_lookups">disable_dns_lookups</a> (no)</b>
Disable DNS lookups in the Postfix SMTP and LMTP clients.
<b><a href="postconf.5.html#inet_interfaces">inet_interfaces</a> (all)</b>
- The network interface addresses that this mail system receives
+ The network interface addresses that this mail system receives
mail on.
<b><a href="postconf.5.html#inet_protocols">inet_protocols</a> (see 'postconf -d output')</b>
- The Internet protocols Postfix will attempt to use when making
+ The Internet protocols Postfix will attempt to use when making
or accepting connections.
<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
- The time limit for sending or receiving information over an
+ The time limit for sending or receiving information over an
internal communication channel.
<b><a href="postconf.5.html#lmtp_assume_final">lmtp_assume_final</a> (no)</b>
- When a remote LMTP server announces no DSN support, assume that
- the server performs final delivery, and send "delivered" deliv-
+ When a remote LMTP server announces no DSN support, assume that
+ the server performs final delivery, and send "delivered" deliv-
ery status notifications instead of "relayed".
<b><a href="postconf.5.html#lmtp_tcp_port">lmtp_tcp_port</a> (24)</b>
The default TCP port that the Postfix LMTP client connects to.
<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
- The maximum amount of time that an idle Postfix daemon process
+ The maximum amount of time that an idle Postfix daemon process
waits for an incoming connection before terminating voluntarily.
<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
The process name of a Postfix command or daemon process.
<b><a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a> (empty)</b>
- The network interface addresses that this mail system receives
+ The network interface addresses that this mail system receives
mail on by way of a proxy or network address translation unit.
<b><a href="postconf.5.html#smtp_address_preference">smtp_address_preference</a> (any)</b>
The address type ("ipv6", "ipv4" or "any") that the Postfix SMTP
- client will try first, when a destination has IPv6 and IPv4
+ client will try first, when a destination has IPv6 and IPv4
addresses with equal MX preference.
<b><a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> (empty)</b>
- An optional numerical network address that the Postfix SMTP
+ An optional numerical network address that the Postfix SMTP
client should bind to when making an IPv4 connection.
<b><a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> (empty)</b>
- An optional numerical network address that the Postfix SMTP
+ An optional numerical network address that the Postfix SMTP
client should bind to when making an IPv6 connection.
<b><a href="postconf.5.html#smtp_helo_name">smtp_helo_name</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
- A prefix that is prepended to the process name in syslog
+ A prefix that is prepended to the process name in syslog
records, so that, for example, "smtpd" becomes "prefix/smtpd".
Available with Postfix 2.2 and earlier:
Available with Postfix 3.0 and later:
<b><a href="postconf.5.html#smtp_address_verify_target">smtp_address_verify_target</a> (rcpt)</b>
- In the context of email address verification, the SMTP protocol
+ In the context of email address verification, the SMTP protocol
stage that determines whether an email address is deliverable.
Available with Postfix 3.1 and later:
Evaluate <a href="postconf.5.html#smtpd_relay_restrictions">smtpd_relay_restrictions</a> before <a href="postconf.5.html#smtpd_recipient_restrictions">smtpd_recipi</a>-
<a href="postconf.5.html#smtpd_recipient_restrictions">ent_restrictions</a>.
+ <b>known_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submis-</b>
+ <b>sion=587)</b>
+ Optional setting that avoids lookups in the <b>services</b>(5) data-
+ base.
+
<b>ADDRESS REWRITING CONTROLS</b>
- See the <a href="ADDRESS_REWRITING_README.html">ADDRESS_REWRITING_README</a> document for a detailed discussion of
+ See the <a href="ADDRESS_REWRITING_README.html">ADDRESS_REWRITING_README</a> document for a detailed discussion of
Postfix address rewriting.
<b><a href="postconf.5.html#receive_override_options">receive_override_options</a> (empty)</b>
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#local_header_rewrite_clients">local_header_rewrite_clients</a> (<a href="postconf.5.html#permit_inet_interfaces">permit_inet_interfaces</a>)</b>
- Rewrite message header addresses in mail from these clients and
+ Rewrite message header addresses in mail from these clients and
update incomplete addresses with the domain name in $<a href="postconf.5.html#myorigin">myorigin</a> or
- $<a href="postconf.5.html#mydomain">mydomain</a>; either don't rewrite message headers from other
+ $<a href="postconf.5.html#mydomain">mydomain</a>; either don't rewrite message headers from other
clients at all, or rewrite message headers and update incomplete
- addresses
with the domain specified in the <a href="postconf.5.html#remote_header_rewrite_domain">remote_header_re</a>-
+ addresses
with the domain specified in the <a href="postconf.5.html#remote_header_rewrite_domain">remote_header_re</a>-
<a href="postconf.5.html#remote_header_rewrite_domain">write_domain</a> parameter.
<b>BEFORE-SMTPD PROXY AGENT</b>
Available in Postfix version 2.10 and later:
<b><a href="postconf.5.html#smtpd_upstream_proxy_protocol">smtpd_upstream_proxy_protocol</a> (empty)</b>
- The name of the proxy protocol used by an optional before-smtpd
+ The name of the proxy protocol used by an optional before-smtpd
proxy agent.
<b><a href="postconf.5.html#smtpd_upstream_proxy_timeout">smtpd_upstream_proxy_timeout</a> (5s)</b>
- The time limit for the proxy protocol specified with the
+ The time limit for the proxy protocol specified with the
<a href="postconf.5.html#smtpd_upstream_proxy_protocol">smtpd_upstream_proxy_protocol</a> parameter.
<b>AFTER QUEUE EXTERNAL CONTENT INSPECTION CONTROLS</b>
- As of version 1.0, Postfix can be configured to send new mail to an
- external content filter AFTER the mail is queued. This content filter
- is expected to inject mail back into a (Postfix or other) MTA for fur-
+ As of version 1.0, Postfix can be configured to send new mail to an
+ external content filter AFTER the mail is queued. This content filter
+ is expected to inject mail back into a (Postfix or other) MTA for fur-
ther delivery. See the <a href="FILTER_README.html">FILTER_README</a> document for details.
<b><a href="postconf.5.html#content_filter">content_filter</a> (empty)</b>
- After the message is queued, send the entire message to the
+ After the message is queued, send the entire message to the
specified <i>transport:destination</i>.
<b>BEFORE QUEUE EXTERNAL CONTENT INSPECTION CONTROLS</b>
- As of version 2.1, the Postfix SMTP server can be configured to send
- incoming mail to a real-time SMTP-based content filter BEFORE mail is
+ As of version 2.1, the Postfix SMTP server can be configured to send
+ incoming mail to a real-time SMTP-based content filter BEFORE mail is
queued. This content filter is expected to inject mail back into Post-
fix. See the <a href="SMTPD_PROXY_README.html">SMTPD_PROXY_README</a> document for details on how to config-
ure and operate this feature.
The hostname and TCP port of the mail filtering proxy server.
<b><a href="postconf.5.html#smtpd_proxy_ehlo">smtpd_proxy_ehlo</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
- How the Postfix SMTP server announces itself to the proxy fil-
+ How the Postfix SMTP server announces itself to the proxy fil-
ter.
<b><a href="postconf.5.html#smtpd_proxy_options">smtpd_proxy_options</a> (empty)</b>
- List of options that control how the Postfix SMTP server commu-
+ List of options that control how the Postfix SMTP server commu-
nicates with a before-queue content filter.
<b><a href="postconf.5.html#smtpd_proxy_timeout">smtpd_proxy_timeout</a> (100s)</b>
- The time limit for connecting to a proxy filter and for sending
+ The time limit for connecting to a proxy filter and for sending
or receiving information.
<b>BEFORE QUEUE MILTER CONTROLS</b>
As of version 2.3, Postfix supports the Sendmail version 8 Milter (mail
- filter) protocol. These content filters run outside Postfix. They can
- inspect the SMTP command stream and the message content, and can
- request
modifications before mail is queued. For details see the <a href="MILTER_README.html">MIL</a>-
+ filter) protocol. These content filters run outside Postfix. They can
+ inspect the SMTP command stream and the message content, and can
+ request
modifications before mail is queued. For details see the <a href="MILTER_README.html">MIL</a>-
<a href="MILTER_README.html">TER_README</a> document.
<b><a href="postconf.5.html#smtpd_milters">smtpd_milters</a> (empty)</b>
- A list of Milter (mail filter) applications for new mail that
+ A list of Milter (mail filter) applications for new mail that
arrives via the Postfix <a href="smtpd.8.html"><b>smtpd</b>(8)</a> server.
<b><a href="postconf.5.html#milter_protocol">milter_protocol</a> (6)</b>
- The mail filter protocol version and optional protocol exten-
- sions for communication with a Milter application; prior to
+ The mail filter protocol version and optional protocol exten-
+ sions for communication with a Milter application; prior to
Postfix 2.6 the default protocol is 2.
<b><a href="postconf.5.html#milter_default_action">milter_default_action</a> (tempfail)</b>
- The default action when a Milter (mail filter) response is
- unavailable (for example, bad Postfix configuration or Milter
+ The default action when a Milter (mail filter) response is
+ unavailable (for example, bad Postfix configuration or Milter
failure).
<b><a href="postconf.5.html#milter_macro_daemon_name">milter_macro_daemon_name</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
- The {daemon_name} macro value for Milter (mail filter) applica-
+ The {daemon_name} macro value for Milter (mail filter) applica-
tions.
<b><a href="postconf.5.html#milter_macro_v">milter_macro_v</a> ($<a href="postconf.5.html#mail_name">mail_name</a> $<a href="postconf.5.html#mail_version">mail_version</a>)</b>
tion, and for negotiating protocol options.
<b><a href="postconf.5.html#milter_command_timeout">milter_command_timeout</a> (30s)</b>
- The time limit for sending an SMTP command to a Milter (mail
+ The time limit for sending an SMTP command to a Milter (mail
filter) application, and for receiving the response.
<b><a href="postconf.5.html#milter_content_timeout">milter_content_timeout</a> (300s)</b>
- The time limit for sending message content to a Milter (mail
+ The time limit for sending message content to a Milter (mail
filter) application, and for receiving the response.
<b><a href="postconf.5.html#milter_connect_macros">milter_connect_macros</a> (see 'postconf -d' output)</b>
- The macros that are sent to Milter (mail filter) applications
+ The macros that are sent to Milter (mail filter) applications
after completion of an SMTP connection.
<b><a href="postconf.5.html#milter_helo_macros">milter_helo_macros</a> (see 'postconf -d' output)</b>
- The macros that are sent to Milter (mail filter) applications
+ The macros that are sent to Milter (mail filter) applications
after the SMTP HELO or EHLO command.
<b><a href="postconf.5.html#milter_mail_macros">milter_mail_macros</a> (see 'postconf -d' output)</b>
- The macros that are sent to Milter (mail filter) applications
+ The macros that are sent to Milter (mail filter) applications
after the SMTP MAIL FROM command.
<b><a href="postconf.5.html#milter_rcpt_macros">milter_rcpt_macros</a> (see 'postconf -d' output)</b>
- The macros that are sent to Milter (mail filter) applications
+ The macros that are sent to Milter (mail filter) applications
after the SMTP RCPT TO command.
<b><a href="postconf.5.html#milter_data_macros">milter_data_macros</a> (see 'postconf -d' output)</b>
- The macros that are sent to version 4 or higher Milter (mail
+ The macros that are sent to version 4 or higher Milter (mail
filter) applications after the SMTP DATA command.
<b><a href="postconf.5.html#milter_unknown_command_macros">milter_unknown_command_macros</a> (see 'postconf -d' output)</b>
- The macros that are sent to version 3 or higher Milter (mail
+ The macros that are sent to version 3 or higher Milter (mail
filter) applications after an unknown SMTP command.
<b><a href="postconf.5.html#milter_end_of_header_macros">milter_end_of_header_macros</a> (see 'postconf -d' output)</b>
- The macros that are sent to Milter (mail filter) applications
+ The macros that are sent to Milter (mail filter) applications
after the end of the message header.
<b><a href="postconf.5.html#milter_end_of_data_macros">milter_end_of_data_macros</a> (see 'postconf -d' output)</b>
- The macros that are sent to Milter (mail filter) applications
+ The macros that are sent to Milter (mail filter) applications
after the message end-of-data.
Available in Postfix version 3.1 and later:
<b><a href="postconf.5.html#milter_macro_defaults">milter_macro_defaults</a> (empty)</b>
- Optional list of <i>name=value</i> pairs that specify default values
- for arbitrary macros that Postfix may send to Milter applica-
+ Optional list of <i>name=value</i> pairs that specify default values
+ for arbitrary macros that Postfix may send to Milter applica-
tions.
Available in Postfix version 3.2 and later:
<b><a href="postconf.5.html#smtpd_milter_maps">smtpd_milter_maps</a> (empty)</b>
- Lookup tables with Milter settings per remote SMTP client IP
+ Lookup tables with Milter settings per remote SMTP client IP
address.
<b>GENERAL CONTENT INSPECTION CONTROLS</b>
- The following parameters are applicable for both built-in and external
+ The following parameters are applicable for both built-in and external
content filters.
Available in Postfix version 2.1 and later:
ing, or address mapping.
<b>EXTERNAL CONTENT INSPECTION CONTROLS</b>
- The following parameters are applicable for both before-queue and
+ The following parameters are applicable for both before-queue and
after-queue content filtering.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_authorized_xforward_hosts">smtpd_authorized_xforward_hosts</a> (empty)</b>
- What remote SMTP clients are allowed to use the XFORWARD fea-
+ What remote SMTP clients are allowed to use the XFORWARD fea-
ture.
<b>SASL AUTHENTICATION CONTROLS</b>
Postfix SASL support (<a href="http://tools.ietf.org/html/rfc4954">RFC 4954</a>) can be used to authenticate remote SMTP
- clients to the Postfix SMTP server, and to authenticate the Postfix
- SMTP client to a remote SMTP server. See the <a href="SASL_README.html">SASL_README</a> document for
+ clients to the Postfix SMTP server, and to authenticate the Postfix
+ SMTP client to a remote SMTP server. See the <a href="SASL_README.html">SASL_README</a> document for
details.
<b><a href="postconf.5.html#broken_sasl_auth_clients">broken_sasl_auth_clients</a> (no)</b>
- Enable interoperability with remote SMTP clients that implement
+ Enable interoperability with remote SMTP clients that implement
an obsolete version of the AUTH command (<a href="http://tools.ietf.org/html/rfc4954">RFC 4954</a>).
<b><a href="postconf.5.html#smtpd_sasl_auth_enable">smtpd_sasl_auth_enable</a> (no)</b>
Enable SASL authentication in the Postfix SMTP server.
<b><a href="postconf.5.html#smtpd_sasl_local_domain">smtpd_sasl_local_domain</a> (empty)</b>
- The name of the Postfix SMTP server's local SASL authentication
+ The name of the Postfix SMTP server's local SASL authentication
realm.
<b><a href="postconf.5.html#smtpd_sasl_security_options">smtpd_sasl_security_options</a> (noanonymous)</b>
Postfix SMTP server SASL security options; as of Postfix 2.3 the
- list of available features depends on the SASL server implemen-
+ list of available features depends on the SASL server implemen-
tation that is selected with <b><a href="postconf.5.html#smtpd_sasl_type">smtpd_sasl_type</a></b>.
<b><a href="postconf.5.html#smtpd_sender_login_maps">smtpd_sender_login_maps</a> (empty)</b>
- Optional lookup table with the SASL login names that own the
+ Optional lookup table with the SASL login names that own the
sender (MAIL FROM) addresses.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_sasl_exceptions_networks">smtpd_sasl_exceptions_networks</a> (empty)</b>
- What remote SMTP clients the Postfix SMTP server will not offer
+ What remote SMTP clients the Postfix SMTP server will not offer
AUTH support to.
Available in Postfix version 2.1 and 2.2:
<b><a href="postconf.5.html#smtpd_sasl_application_name">smtpd_sasl_application_name</a> (smtpd)</b>
- The application name that the Postfix SMTP server uses for SASL
+ The application name that the Postfix SMTP server uses for SASL
server initialization.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#smtpd_sasl_path">smtpd_sasl_path</a> (smtpd)</b>
Implementation-specific information that the Postfix SMTP server
- passes through to the SASL plug-in implementation that is
+ passes through to the SASL plug-in implementation that is
selected with <b><a href="postconf.5.html#smtpd_sasl_type">smtpd_sasl_type</a></b>.
<b><a href="postconf.5.html#smtpd_sasl_type">smtpd_sasl_type</a> (cyrus)</b>
- The SASL plug-in type that the Postfix SMTP server should use
+ The SASL plug-in type that the Postfix SMTP server should use
for authentication.
Available in Postfix version 2.5 and later:
Available in Postfix version 2.11 and later:
<b>smtpd_sasl_service (smtp)</b>
- The service name that is passed to the SASL plug-in that is
+ The service name that is passed to the SASL plug-in that is
selected with <b><a href="postconf.5.html#smtpd_sasl_type">smtpd_sasl_type</a></b> and <b><a href="postconf.5.html#smtpd_sasl_path">smtpd_sasl_path</a></b>.
Available in Postfix version 3.4 and later:
Available in Postfix 3.6 and later:
<b><a href="postconf.5.html#smtpd_sasl_mechanism_filter">smtpd_sasl_mechanism_filter</a> (!external, <a href="DATABASE_README.html#types">static</a>:rest)</b>
- If non-empty, a filter for the SASL mechanism names that the
+ If non-empty, a filter for the SASL mechanism names that the
Postfix SMTP server will announce in the EHLO response.
<b>STARTTLS SUPPORT CONTROLS</b>
- Detailed information about STARTTLS configuration may be found in the
+ Detailed information about STARTTLS configuration may be found in the
<a href="TLS_README.html">TLS_README</a> document.
<b><a href="postconf.5.html#smtpd_tls_security_level">smtpd_tls_security_level</a> (empty)</b>
- The SMTP TLS security level for the Postfix SMTP server; when a
+ The SMTP TLS security level for the Postfix SMTP server; when a
non-empty value is specified, this overrides the obsolete param-
eters <a href="postconf.5.html#smtpd_use_tls">smtpd_use_tls</a> and <a href="postconf.5.html#smtpd_enforce_tls">smtpd_enforce_tls</a>.
<b><a href="postconf.5.html#smtpd_sasl_tls_security_options">smtpd_sasl_tls_security_options</a> ($<a href="postconf.5.html#smtpd_sasl_security_options">smtpd_sasl_security_options</a>)</b>
- The SASL authentication security options that the Postfix SMTP
+ The SASL authentication security options that the Postfix SMTP
server uses for TLS encrypted SMTP sessions.
<b><a href="postconf.5.html#smtpd_starttls_timeout">smtpd_starttls_timeout</a> (see 'postconf -d' output)</b>
during TLS startup and shutdown handshake procedures.
<b><a href="postconf.5.html#smtpd_tls_CAfile">smtpd_tls_CAfile</a> (empty)</b>
- A file containing (PEM format) CA certificates of root CAs
+ A file containing (PEM format) CA certificates of root CAs
trusted to sign either remote SMTP client certificates or inter-
mediate CA certificates.
<b><a href="postconf.5.html#smtpd_tls_CApath">smtpd_tls_CApath</a> (empty)</b>
- A directory containing (PEM format) CA certificates of root CAs
+ A directory containing (PEM format) CA certificates of root CAs
trusted to sign either remote SMTP client certificates or inter-
mediate CA certificates.
<b><a href="postconf.5.html#smtpd_tls_always_issue_session_ids">smtpd_tls_always_issue_session_ids</a> (yes)</b>
- Force the Postfix SMTP server to issue a TLS session id, even
- when
TLS session caching is turned off (<a href="postconf.5.html#smtpd_tls_session_cache_database">smtpd_tls_ses</a>-
+ Force the Postfix SMTP server to issue a TLS session id, even
+ when
TLS session caching is turned off (<a href="postconf.5.html#smtpd_tls_session_cache_database">smtpd_tls_ses</a>-
<a href="postconf.5.html#smtpd_tls_session_cache_database">sion_cache_database</a> is empty).
<b><a href="postconf.5.html#smtpd_tls_ask_ccert">smtpd_tls_ask_ccert</a> (no)</b>
Ask a remote SMTP client for a client certificate.
<b><a href="postconf.5.html#smtpd_tls_auth_only">smtpd_tls_auth_only</a> (no)</b>
- When TLS encryption is optional in the Postfix SMTP server, do
+ When TLS encryption is optional in the Postfix SMTP server, do
not announce or accept SASL authentication over unencrypted con-
nections.
File with the Postfix SMTP server RSA certificate in PEM format.
<b><a href="postconf.5.html#smtpd_tls_exclude_ciphers">smtpd_tls_exclude_ciphers</a> (empty)</b>
- List of ciphers or cipher types to exclude from the SMTP server
+ List of ciphers or cipher types to exclude from the SMTP server
cipher list at all TLS security levels.
<b><a href="postconf.5.html#smtpd_tls_dcert_file">smtpd_tls_dcert_file</a> (empty)</b>
File with the Postfix SMTP server DSA certificate in PEM format.
<b><a href="postconf.5.html#smtpd_tls_dh1024_param_file">smtpd_tls_dh1024_param_file</a> (empty)</b>
- File with DH parameters that the Postfix SMTP server should use
+ File with DH parameters that the Postfix SMTP server should use
with non-export EDH ciphers.
<b><a href="postconf.5.html#smtpd_tls_dh512_param_file">smtpd_tls_dh512_param_file</a> (empty)</b>
- File with DH parameters that the Postfix SMTP server should use
+ File with DH parameters that the Postfix SMTP server should use
with export-grade EDH ciphers.
<b><a href="postconf.5.html#smtpd_tls_dkey_file">smtpd_tls_dkey_file</a> ($<a href="postconf.5.html#smtpd_tls_dcert_file">smtpd_tls_dcert_file</a>)</b>
Enable additional Postfix SMTP server logging of TLS activity.
<b><a href="postconf.5.html#smtpd_tls_mandatory_ciphers">smtpd_tls_mandatory_ciphers</a> (medium)</b>
- The minimum TLS cipher grade that the Postfix SMTP server will
+ The minimum TLS cipher grade that the Postfix SMTP server will
use with mandatory TLS encryption.
<b><a href="postconf.5.html#smtpd_tls_mandatory_exclude_ciphers">smtpd_tls_mandatory_exclude_ciphers</a> (empty)</b>
- Additional list of ciphers or cipher types to exclude from the
- Postfix SMTP server cipher list at mandatory TLS security lev-
+ Additional list of ciphers or cipher types to exclude from the
+ Postfix SMTP server cipher list at mandatory TLS security lev-
els.
<b><a href="postconf.5.html#smtpd_tls_mandatory_protocols">smtpd_tls_mandatory_protocols</a> (see 'postconf -d' output)</b>
<b><a href="postconf.5.html#smtpd_tls_received_header">smtpd_tls_received_header</a> (no)</b>
Request that the Postfix SMTP server produces Received: message
- headers that include information about the protocol and cipher
- used, as well as the remote SMTP client CommonName and client
+ headers that include information about the protocol and cipher
+ used, as well as the remote SMTP client CommonName and client
certificate issuer CommonName.
<b><a href="postconf.5.html#smtpd_tls_req_ccert">smtpd_tls_req_ccert</a> (no)</b>
- With mandatory TLS encryption, require a trusted remote SMTP
+ With mandatory TLS encryption, require a trusted remote SMTP
client certificate in order to allow TLS connections to proceed.
<b><a href="postconf.5.html#smtpd_tls_wrappermode">smtpd_tls_wrappermode</a> (no)</b>
- Run the Postfix SMTP server in the non-standard "wrapper" mode,
+ Run the Postfix SMTP server in the non-standard "wrapper" mode,
instead of using the STARTTLS command.
<b><a href="postconf.5.html#tls_daemon_random_bytes">tls_daemon_random_bytes</a> (32)</b>
- The
number of pseudo-random bytes that an <a href="smtp.8.html"><b>smtp</b>(8)</a> or <a href="smtpd.8.html"><b>smtpd</b>(8)</a>
- process requests from the <a href="tlsmgr.8.html"><b>tlsmgr</b>(8)</a> server in order to seed its
+ The
number of pseudo-random bytes that an <a href="smtp.8.html"><b>smtp</b>(8)</a> or <a href="smtpd.8.html"><b>smtpd</b>(8)</a>
+ process requests from the <a href="tlsmgr.8.html"><b>tlsmgr</b>(8)</a> server in order to seed its
internal pseudo random number generator (PRNG).
<b><a href="postconf.5.html#tls_high_cipherlist">tls_high_cipherlist</a> (see 'postconf -d' output)</b>
The OpenSSL cipherlist for "export" or higher grade ciphers.
<b><a href="postconf.5.html#tls_null_cipherlist">tls_null_cipherlist</a> (eNULL:!aNULL)</b>
- The OpenSSL cipherlist for "NULL" grade ciphers that provide
+ The OpenSSL cipherlist for "NULL" grade ciphers that provide
authentication without encryption.
Available in Postfix version 2.5 and later:
<b><a href="postconf.5.html#smtpd_tls_fingerprint_digest">smtpd_tls_fingerprint_digest</a> (see 'postconf -d' output)</b>
- The message digest algorithm to construct remote SMTP
- client-certificate fingerprints or public key fingerprints
- (Postfix 2.9 and later) for <b><a href="postconf.5.html#check_ccert_access">check_ccert_access</a></b> and <b>per-</b>
+ The message digest algorithm to construct remote SMTP
+ client-certificate fingerprints or public key fingerprints
+ (Postfix 2.9 and later) for <b><a href="postconf.5.html#check_ccert_access">check_ccert_access</a></b> and <b>per-</b>
<b>mit_tls_clientcerts</b>.
Available in Postfix version 2.6 and later:
<b><a href="postconf.5.html#smtpd_tls_protocols">smtpd_tls_protocols</a> (see postconf -d output)</b>
- TLS protocols accepted by the Postfix SMTP server with oppor-
+ TLS protocols accepted by the Postfix SMTP server with oppor-
tunistic TLS encryption.
<b><a href="postconf.5.html#smtpd_tls_ciphers">smtpd_tls_ciphers</a> (medium)</b>
- The minimum TLS cipher grade that the Postfix SMTP server will
+ The minimum TLS cipher grade that the Postfix SMTP server will
use with opportunistic TLS encryption.
<b><a href="postconf.5.html#smtpd_tls_eccert_file">smtpd_tls_eccert_file</a> (empty)</b>
- File with the Postfix SMTP server ECDSA certificate in PEM for-
+ File with the Postfix SMTP server ECDSA certificate in PEM for-
mat.
<b><a href="postconf.5.html#smtpd_tls_eckey_file">smtpd_tls_eckey_file</a> ($<a href="postconf.5.html#smtpd_tls_eccert_file">smtpd_tls_eccert_file</a>)</b>
- File with the Postfix SMTP server ECDSA private key in PEM for-
+ File with the Postfix SMTP server ECDSA private key in PEM for-
mat.
<b><a href="postconf.5.html#smtpd_tls_eecdh_grade">smtpd_tls_eecdh_grade</a> (see 'postconf -d' output)</b>
- The Postfix SMTP server security grade for ephemeral ellip-
+ The Postfix SMTP server security grade for ephemeral ellip-
tic-curve Diffie-Hellman (EECDH) key exchange.
<b><a href="postconf.5.html#tls_eecdh_strong_curve">tls_eecdh_strong_curve</a> (prime256v1)</b>
- The elliptic curve used by the Postfix SMTP server for sensibly
+ The elliptic curve used by the Postfix SMTP server for sensibly
strong ephemeral ECDH key exchange.
<b><a href="postconf.5.html#tls_eecdh_ultra_curve">tls_eecdh_ultra_curve</a> (secp384r1)</b>
<b><a href="postconf.5.html#tls_preempt_cipherlist">tls_preempt_cipherlist</a> (no)</b>
With SSLv3 and later, use the Postfix SMTP server's cipher pref-
- erence order instead of the remote client's cipher preference
+ erence order instead of the remote client's cipher preference
order.
<b><a href="postconf.5.html#tls_disable_workarounds">tls_disable_workarounds</a> (see 'postconf -d' output)</b>
Available in Postfix version 3.0 and later:
- <b><a href="postconf.5.html#tls_session_ticket_cipher">tls_session_ticket_cipher</a> (Postfix</b> ><b>= 3.0: aes-256-cbc, Postfix</b> < <b>3.0:</b>
+ <b><a href="postconf.5.html#tls_session_ticket_cipher">tls_session_ticket_cipher</a> (Postfix</b> ><b>= 3.0: aes-256-cbc, Postfix</b> < <b>3.0:</b>
<b>aes-128-cbc)</b>
Algorithm used to encrypt <a href="http://tools.ietf.org/html/rfc5077">RFC5077</a> TLS session tickets.
Available in Postfix version 3.4 and later:
<b><a href="postconf.5.html#smtpd_tls_chain_files">smtpd_tls_chain_files</a> (empty)</b>
- List of one or more PEM files, each holding one or more private
+ List of one or more PEM files, each holding one or more private
keys directly followed by a corresponding certificate chain.
<b><a href="postconf.5.html#tls_server_sni_maps">tls_server_sni_maps</a> (empty)</b>
- Optional lookup tables that map names received from remote SMTP
- clients via the TLS Server Name Indication (SNI) extension to
+ Optional lookup tables that map names received from remote SMTP
+ clients via the TLS Server Name Indication (SNI) extension to
the appropriate keys and certificate chains.
Available in Postfix 3.5, 3.4.6, 3.3.5, 3.2.10, 3.1.13 and later:
<b><a href="postconf.5.html#tls_fast_shutdown_enable">tls_fast_shutdown_enable</a> (yes)</b>
- A workaround for implementations that hang Postfix while shut-
+ A workaround for implementations that hang Postfix while shut-
ting down a TLS session, until Postfix times out.
Available in Postfix 3.5 and later:
<b><a href="postconf.5.html#info_log_address_format">info_log_address_format</a> (external)</b>
- The email address form that will be used in non-debug logging
+ The email address form that will be used in non-debug logging
(info, warning, etc.).
<b>OBSOLETE STARTTLS CONTROLS</b>
- The following configuration parameters exist for compatibility with
- Postfix versions before 2.3. Support for these will be removed in a
+ The following configuration parameters exist for compatibility with
+ Postfix versions before 2.3. Support for these will be removed in a
future release.
<b><a href="postconf.5.html#smtpd_use_tls">smtpd_use_tls</a> (no)</b>
- Opportunistic TLS: announce STARTTLS support to remote SMTP
+ Opportunistic TLS: announce STARTTLS support to remote SMTP
clients, but do not require that clients use TLS encryption.
<b><a href="postconf.5.html#smtpd_enforce_tls">smtpd_enforce_tls</a> (no)</b>
and require that clients use TLS encryption.
<b><a href="postconf.5.html#smtpd_tls_cipherlist">smtpd_tls_cipherlist</a> (empty)</b>
- Obsolete Postfix < 2.3 control for the Postfix SMTP server TLS
+ Obsolete Postfix < 2.3 control for the Postfix SMTP server TLS
cipher list.
<b>SMTPUTF8 CONTROLS</b>
Preliminary SMTPUTF8 support is introduced with Postfix 3.0.
<b><a href="postconf.5.html#smtputf8_enable">smtputf8_enable</a> (yes)</b>
- Enable preliminary SMTPUTF8 support for the protocols described
+ Enable preliminary SMTPUTF8 support for the protocols described
in <a href="http://tools.ietf.org/html/rfc6531">RFC 6531</a>..6533.
<b><a href="postconf.5.html#strict_smtputf8">strict_smtputf8</a> (no)</b>
Enable stricter enforcement of the SMTPUTF8 protocol.
<b><a href="postconf.5.html#smtputf8_autodetect_classes">smtputf8_autodetect_classes</a> (sendmail, verify)</b>
- Detect that a message requires SMTPUTF8 support for the speci-
+ Detect that a message requires SMTPUTF8 support for the speci-
fied mail origin classes.
Available in Postfix version 3.2 and later:
<b><a href="postconf.5.html#enable_idna2003_compatibility">enable_idna2003_compatibility</a> (no)</b>
- Enable 'transitional' compatibility between IDNA2003 and
- IDNA2008, when converting UTF-8 domain names to/from the ASCII
+ Enable 'transitional' compatibility between IDNA2003 and
+ IDNA2008, when converting UTF-8 domain names to/from the ASCII
form that is used for DNS lookups.
<b>VERP SUPPORT CONTROLS</b>
- With VERP style delivery, each recipient of a message receives a cus-
- tomized copy of the message with his/her own recipient address encoded
+ With VERP style delivery, each recipient of a message receives a cus-
+ tomized copy of the message with his/her own recipient address encoded
in the envelope sender address. The <a href="VERP_README.html">VERP_README</a> file describes config-
- uration and operation details of Postfix support for variable envelope
- return path addresses. VERP style delivery is requested with the SMTP
- XVERP command or with the "sendmail -V" command-line option and is
+ uration and operation details of Postfix support for variable envelope
+ return path addresses. VERP style delivery is requested with the SMTP
+ XVERP command or with the "sendmail -V" command-line option and is
available in Postfix version 1.1 and later.
<b><a href="postconf.5.html#default_verp_delimiters">default_verp_delimiters</a> (+=)</b>
The two default VERP delimiter characters.
<b><a href="postconf.5.html#verp_delimiter_filter">verp_delimiter_filter</a> (-=+)</b>
- The characters Postfix accepts as VERP delimiter characters on
+ The characters Postfix accepts as VERP delimiter characters on
the Postfix <a href="sendmail.1.html"><b>sendmail</b>(1)</a> command line and in SMTP commands.
Available in Postfix version 1.1 and 2.0:
<b><a href="postconf.5.html#authorized_verp_clients">authorized_verp_clients</a> ($<a href="postconf.5.html#mynetworks">mynetworks</a>)</b>
- What remote SMTP clients are allowed to specify the XVERP com-
+ What remote SMTP clients are allowed to specify the XVERP com-
mand.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_authorized_verp_clients">smtpd_authorized_verp_clients</a> ($<a href="postconf.5.html#authorized_verp_clients">authorized_verp_clients</a>)</b>
- What remote SMTP clients are allowed to specify the XVERP com-
+ What remote SMTP clients are allowed to specify the XVERP com-
mand.
<b>TROUBLE SHOOTING CONTROLS</b>
- The <a href="DEBUG_README.html">DEBUG_README</a> document describes how to debug parts of the Postfix
- mail system. The methods vary from making the software log a lot of
+ The <a href="DEBUG_README.html">DEBUG_README</a> document describes how to debug parts of the Postfix
+ mail system. The methods vary from making the software log a lot of
detail, to running some daemon processes under control of a call tracer
or debugger.
<b><a href="postconf.5.html#debug_peer_level">debug_peer_level</a> (2)</b>
- The increment in verbose logging level when a nexthop destina-
- tion, remote client or server name or network address matches a
+ The increment in verbose logging level when a nexthop destina-
+ tion, remote client or server name or network address matches a
pattern given with the <a href="postconf.5.html#debug_peer_list">debug_peer_list</a> parameter.
<b><a href="postconf.5.html#debug_peer_list">debug_peer_list</a> (empty)</b>
- Optional list of nexthop destination, remote client or server
- name or network address patterns that, if matched, cause the
- verbose logging level to increase by the amount specified in
+ Optional list of nexthop destination, remote client or server
+ name or network address patterns that, if matched, cause the
+ verbose logging level to increase by the amount specified in
$<a href="postconf.5.html#debug_peer_level">debug_peer_level</a>.
<b><a href="postconf.5.html#error_notice_recipient">error_notice_recipient</a> (postmaster)</b>
- The recipient of postmaster notifications about mail delivery
+ The recipient of postmaster notifications about mail delivery
problems that are caused by policy, resource, software or proto-
col errors.
<b><a href="postconf.5.html#internal_mail_filter_classes">internal_mail_filter_classes</a> (empty)</b>
- What categories of Postfix-generated mail are subject to
- before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
+ What categories of Postfix-generated mail are subject to
+ before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
<a href="postconf.5.html#header_checks">header_checks</a> and <a href="postconf.5.html#body_checks">body_checks</a>.
<b><a href="postconf.5.html#notify_classes">notify_classes</a> (resource, software)</b>
The list of error classes that are reported to the postmaster.
<b><a href="postconf.5.html#smtpd_reject_footer">smtpd_reject_footer</a> (empty)</b>
- Optional information that is appended after each Postfix SMTP
+ Optional information that is appended after each Postfix SMTP
server 4XX or 5XX response.
<b><a href="postconf.5.html#soft_bounce">soft_bounce</a> (no)</b>
- Safety net to keep mail queued that would otherwise be returned
+ Safety net to keep mail queued that would otherwise be returned
to the sender.
Available in Postfix version 2.1 and later:
Available in Postfix version 2.10 and later:
<b><a href="postconf.5.html#smtpd_log_access_permit_actions">smtpd_log_access_permit_actions</a> (empty)</b>
- Enable logging of the named "permit" actions in SMTP server
- access lists (by default, the SMTP server logs "reject" actions
+ Enable logging of the named "permit" actions in SMTP server
+ access lists (by default, the SMTP server logs "reject" actions
but not "permit" actions).
<b>KNOWN VERSUS UNKNOWN RECIPIENT CONTROLS</b>
- As of Postfix version 2.0, the SMTP server rejects mail for unknown
+ As of Postfix version 2.0, the SMTP server rejects mail for unknown
recipients. This prevents the mail queue from clogging up with undeliv-
- erable MAILER-DAEMON messages. Additional information on this topic is
+ erable MAILER-DAEMON messages. Additional information on this topic is
in the <a href="LOCAL_RECIPIENT_README.html">LOCAL_RECIPIENT_README</a> and <a href="ADDRESS_CLASS_README.html">ADDRESS_CLASS_README</a> documents.
<b><a href="postconf.5.html#show_user_unknown_table_name">show_user_unknown_table_name</a> (yes)</b>
- Display the name of the recipient table in the "User unknown"
+ Display the name of the recipient table in the "User unknown"
responses.
<b><a href="postconf.5.html#canonical_maps">canonical_maps</a> (empty)</b>
- Optional address mapping lookup tables for message headers and
+ Optional address mapping lookup tables for message headers and
envelopes.
<b><a href="postconf.5.html#recipient_canonical_maps">recipient_canonical_maps</a> (empty)</b>
- Optional address mapping lookup tables for envelope and header
+ Optional address mapping lookup tables for envelope and header
recipient addresses.
<b><a href="postconf.5.html#sender_canonical_maps">sender_canonical_maps</a> (empty)</b>
- Optional address mapping lookup tables for envelope and header
+ Optional address mapping lookup tables for envelope and header
sender addresses.
Parameters concerning known/unknown local recipients:
<b><a href="postconf.5.html#mydestination">mydestination</a> ($<a href="postconf.5.html#myhostname">myhostname</a>, localhost.$<a href="postconf.5.html#mydomain">mydomain</a>, localhost)</b>
- The
list of domains that are delivered via the $<a href="postconf.5.html#local_transport">local_transport</a>
+ The
list of domains that are delivered via the $<a href="postconf.5.html#local_transport">local_transport</a>
mail delivery transport.
<b><a href="postconf.5.html#inet_interfaces">inet_interfaces</a> (all)</b>
- The network interface addresses that this mail system receives
+ The network interface addresses that this mail system receives
mail on.
<b><a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a> (empty)</b>
- The network interface addresses that this mail system receives
+ The network interface addresses that this mail system receives
mail on by way of a proxy or network address translation unit.
<b><a href="postconf.5.html#inet_protocols">inet_protocols</a> (see 'postconf -d output')</b>
- The Internet protocols Postfix will attempt to use when making
+ The Internet protocols Postfix will attempt to use when making
or accepting connections.
<b><a href="postconf.5.html#local_recipient_maps">local_recipient_maps</a> (<a href="proxymap.8.html">proxy</a>:unix:passwd.byname $<a href="postconf.5.html#alias_maps">alias_maps</a>)</b>
Lookup tables with all names or addresses of local recipients: a
- recipient
address is local when its domain matches $<a href="postconf.5.html#mydestination">mydestina</a>-
+ recipient
address is local when its domain matches $<a href="postconf.5.html#mydestination">mydestina</a>-
<a href="postconf.5.html#mydestination">tion</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a> or $<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>.
<b><a href="postconf.5.html#unknown_local_recipient_reject_code">unknown_local_recipient_reject_code</a> (550)</b>
The numerical Postfix SMTP server response code when a recipient
- address is local, and $<a href="postconf.5.html#local_recipient_maps">local_recipient_maps</a> specifies a list of
+ address is local, and $<a href="postconf.5.html#local_recipient_maps">local_recipient_maps</a> specifies a list of
lookup tables that does not match the recipient.
Parameters concerning known/unknown recipients of relay destinations:
<b><a href="postconf.5.html#relay_domains">relay_domains</a> (Postfix</b> ><b>= 3.0: empty, Postfix</b> < <b>3.0: $<a href="postconf.5.html#mydestination">mydestination</a>)</b>
- What destination domains (and subdomains thereof) this system
+ What destination domains (and subdomains thereof) this system
will relay mail to.
<b><a href="postconf.5.html#relay_recipient_maps">relay_recipient_maps</a> (empty)</b>
- Optional lookup tables with all valid addresses in the domains
+ Optional lookup tables with all valid addresses in the domains
that match $<a href="postconf.5.html#relay_domains">relay_domains</a>.
<b><a href="postconf.5.html#unknown_relay_recipient_reject_code">unknown_relay_recipient_reject_code</a> (550)</b>
- The numerical Postfix SMTP server reply code when a recipient
- address matches $<a href="postconf.5.html#relay_domains">relay_domains</a>, and <a href="postconf.5.html#relay_recipient_maps">relay_recipient_maps</a> speci-
- fies a list of lookup tables that does not match the recipient
+ The numerical Postfix SMTP server reply code when a recipient
+ address matches $<a href="postconf.5.html#relay_domains">relay_domains</a>, and <a href="postconf.5.html#relay_recipient_maps">relay_recipient_maps</a> speci-
+ fies a list of lookup tables that does not match the recipient
address.
- Parameters concerning known/unknown recipients in virtual alias
+ Parameters concerning known/unknown recipients in virtual alias
domains:
<b><a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a> ($<a href="postconf.5.html#virtual_alias_maps">virtual_alias_maps</a>)</b>
- Postfix is final destination for the specified list of virtual
- alias domains, that is, domains for which all addresses are
+ Postfix is final destination for the specified list of virtual
+ alias domains, that is, domains for which all addresses are
aliased to addresses in other local or remote domains.
<b><a href="postconf.5.html#virtual_alias_maps">virtual_alias_maps</a> ($<a href="postconf.5.html#virtual_maps">virtual_maps</a>)</b>
- Optional lookup tables that alias specific mail addresses or
+ Optional lookup tables that alias specific mail addresses or
domains to other local or remote address.
<b><a href="postconf.5.html#unknown_virtual_alias_reject_code">unknown_virtual_alias_reject_code</a> (550)</b>
- The Postfix SMTP server reply code when a recipient address
- matches $<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, and $<a href="postconf.5.html#virtual_alias_maps">virtual_alias_maps</a> speci-
- fies a list of lookup tables that does not match the recipient
+ The Postfix SMTP server reply code when a recipient address
+ matches $<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, and $<a href="postconf.5.html#virtual_alias_maps">virtual_alias_maps</a> speci-
+ fies a list of lookup tables that does not match the recipient
address.
Parameters concerning known/unknown recipients in virtual mailbox
domains:
<b><a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a> ($<a href="postconf.5.html#virtual_mailbox_maps">virtual_mailbox_maps</a>)</b>
- Postfix is final destination for the specified list of domains;
- mail is delivered via the $<a href="postconf.5.html#virtual_transport">virtual_transport</a> mail delivery
+ Postfix is final destination for the specified list of domains;
+ mail is delivered via the $<a href="postconf.5.html#virtual_transport">virtual_transport</a> mail delivery
transport.
<b><a href="postconf.5.html#virtual_mailbox_maps">virtual_mailbox_maps</a> (empty)</b>
- Optional lookup tables with all valid addresses in the domains
+ Optional lookup tables with all valid addresses in the domains
that match $<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>.
<b><a href="postconf.5.html#unknown_virtual_mailbox_reject_code">unknown_virtual_mailbox_reject_code</a> (550)</b>
- The Postfix SMTP server reply code when a recipient address
- matches
$<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>, and $<a href="postconf.5.html#virtual_mailbox_maps">virtual_mailbox_maps</a>
+ The Postfix SMTP server reply code when a recipient address
+ matches
$<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>, and $<a href="postconf.5.html#virtual_mailbox_maps">virtual_mailbox_maps</a>
specifies a list of lookup tables that does not match the recip-
ient address.
control client request rates.
<b><a href="postconf.5.html#line_length_limit">line_length_limit</a> (2048)</b>
- Upon input, long lines are chopped up into pieces of at most
+ Upon input, long lines are chopped up into pieces of at most
this length; upon delivery, long lines are reconstructed.
<b><a href="postconf.5.html#queue_minfree">queue_minfree</a> (0)</b>
tem that is needed to receive mail.
<b><a href="postconf.5.html#message_size_limit">message_size_limit</a> (10240000)</b>
- The maximal size in bytes of a message, including envelope
+ The maximal size in bytes of a message, including envelope
information.
<b><a href="postconf.5.html#smtpd_recipient_limit">smtpd_recipient_limit</a> (1000)</b>
- The maximal number of recipients that the Postfix SMTP server
+ The maximal number of recipients that the Postfix SMTP server
accepts per message delivery request.
<b><a href="postconf.5.html#smtpd_timeout">smtpd_timeout</a> (normal: 300s, overload: 10s)</b>
- The time limit for sending a Postfix SMTP server response and
+ The time limit for sending a Postfix SMTP server response and
for receiving a remote SMTP client request.
<b><a href="postconf.5.html#smtpd_history_flush_threshold">smtpd_history_flush_threshold</a> (100)</b>
- The maximal number of lines in the Postfix SMTP server command
- history before it is flushed upon receipt of EHLO, RSET, or end
+ The maximal number of lines in the Postfix SMTP server command
+ history before it is flushed upon receipt of EHLO, RSET, or end
of DATA.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#smtpd_peername_lookup">smtpd_peername_lookup</a> (yes)</b>
- Attempt to look up the remote SMTP client hostname, and verify
+ Attempt to look up the remote SMTP client hostname, and verify
that the name matches the client IP address.
The per SMTP client connection count and request rate limits are imple-
- mented in co-operation with the <a href="anvil.8.html"><b>anvil</b>(8)</a> service, and are available in
+ mented in co-operation with the <a href="anvil.8.html"><b>anvil</b>(8)</a> service, and are available in
Postfix version 2.2 and later.
<b><a href="postconf.5.html#smtpd_client_connection_count_limit">smtpd_client_connection_count_limit</a> (50)</b>
- How many simultaneous connections any client is allowed to make
+ How many simultaneous connections any client is allowed to make
to this service.
<b><a href="postconf.5.html#smtpd_client_connection_rate_limit">smtpd_client_connection_rate_limit</a> (0)</b>
- The maximal number of connection attempts any client is allowed
+ The maximal number of connection attempts any client is allowed
to make to this service per time unit.
<b><a href="postconf.5.html#smtpd_client_message_rate_limit">smtpd_client_message_rate_limit</a> (0)</b>
- The maximal number of message delivery requests that any client
- is allowed to make to this service per time unit, regardless of
+ The maximal number of message delivery requests that any client
+ is allowed to make to this service per time unit, regardless of
whether or not Postfix actually accepts those messages.
<b><a href="postconf.5.html#smtpd_client_recipient_rate_limit">smtpd_client_recipient_rate_limit</a> (0)</b>
- The maximal number of recipient addresses that any client is
- allowed to send to this service per time unit, regardless of
+ The maximal number of recipient addresses that any client is
+ allowed to send to this service per time unit, regardless of
whether or not Postfix actually accepts those recipients.
<b><a href="postconf.5.html#smtpd_client_event_limit_exceptions">smtpd_client_event_limit_exceptions</a> ($<a href="postconf.5.html#mynetworks">mynetworks</a>)</b>
- Clients that are excluded from smtpd_client_*_count/rate_limit
+ Clients that are excluded from smtpd_client_*_count/rate_limit
restrictions.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#smtpd_client_new_tls_session_rate_limit">smtpd_client_new_tls_session_rate_limit</a> (0)</b>
- The maximal number of new (i.e., uncached) TLS sessions that a
+ The maximal number of new (i.e., uncached) TLS sessions that a
remote SMTP client is allowed to negotiate with this service per
time unit.
<b><a href="postconf.5.html#smtpd_per_record_deadline">smtpd_per_record_deadline</a> (normal: no, overload: yes)</b>
Change the behavior of the <a href="postconf.5.html#smtpd_timeout">smtpd_timeout</a> and <a href="postconf.5.html#smtpd_starttls_timeout">smtpd_start</a>-
- <a href="postconf.5.html#smtpd_starttls_timeout">tls_timeout</a> time limits, from a time limit per read or write
- system call, to a time limit to send or receive a complete
- record (an SMTP command line, SMTP response line, SMTP message
+ <a href="postconf.5.html#smtpd_starttls_timeout">tls_timeout</a> time limits, from a time limit per read or write
+ system call, to a time limit to send or receive a complete
+ record (an SMTP command line, SMTP response line, SMTP message
content line, or TLS protocol message).
Available in Postfix version 3.1 and later:
<b><a href="postconf.5.html#smtpd_client_auth_rate_limit">smtpd_client_auth_rate_limit</a> (0)</b>
- The maximal number of AUTH commands that any client is allowed
- to send to this service per time unit, regardless of whether or
+ The maximal number of AUTH commands that any client is allowed
+ to send to this service per time unit, regardless of whether or
not Postfix actually accepts those commands.
<b>TARPIT CONTROLS</b>
- When a remote SMTP client makes errors, the Postfix SMTP server can
- insert delays before responding. This can help to slow down run-away
- software. The behavior is controlled by an error counter that counts
+ When a remote SMTP client makes errors, the Postfix SMTP server can
+ insert delays before responding. This can help to slow down run-away
+ software. The behavior is controlled by an error counter that counts
the number of errors within an SMTP session that a client makes without
delivering mail.
<b><a href="postconf.5.html#smtpd_error_sleep_time">smtpd_error_sleep_time</a> (1s)</b>
- With Postfix version 2.1 and later: the SMTP server response
- delay
after a client has made more than $<a href="postconf.5.html#smtpd_soft_error_limit">smtpd_soft_error_limit</a>
- errors, and fewer than $<a href="postconf.5.html#smtpd_hard_error_limit">smtpd_hard_error_limit</a> errors, without
+ With Postfix version 2.1 and later: the SMTP server response
+ delay
after a client has made more than $<a href="postconf.5.html#smtpd_soft_error_limit">smtpd_soft_error_limit</a>
+ errors, and fewer than $<a href="postconf.5.html#smtpd_hard_error_limit">smtpd_hard_error_limit</a> errors, without
delivering mail.
<b><a href="postconf.5.html#smtpd_soft_error_limit">smtpd_soft_error_limit</a> (10)</b>
- The number of errors a remote SMTP client is allowed to make
- without delivering mail before the Postfix SMTP server slows
+ The number of errors a remote SMTP client is allowed to make
+ without delivering mail before the Postfix SMTP server slows
down all its responses.
<b><a href="postconf.5.html#smtpd_hard_error_limit">smtpd_hard_error_limit</a> (normal: 20, overload: 1)</b>
- The maximal number of errors a remote SMTP client is allowed to
+ The maximal number of errors a remote SMTP client is allowed to
make without delivering mail.
<b><a href="postconf.5.html#smtpd_junk_command_limit">smtpd_junk_command_limit</a> (normal: 100, overload: 1)</b>
- The number of junk commands (NOOP, VRFY, ETRN or RSET) that a
- remote SMTP client can send before the Postfix SMTP server
+ The number of junk commands (NOOP, VRFY, ETRN or RSET) that a
+ remote SMTP client can send before the Postfix SMTP server
starts to increment the error counter with each junk command.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_recipient_overshoot_limit">smtpd_recipient_overshoot_limit</a> (1000)</b>
- The number of recipients that a remote SMTP client can send in
+ The number of recipients that a remote SMTP client can send in
excess of the limit specified with $<a href="postconf.5.html#smtpd_recipient_limit">smtpd_recipient_limit</a>,
- before the Postfix SMTP server increments the per-session error
+ before the Postfix SMTP server increments the per-session error
count for each excess recipient.
<b>ACCESS POLICY DELEGATION CONTROLS</b>
- As of version 2.1, Postfix can be configured to delegate access policy
- decisions to an external server that runs outside Postfix. See the
+ As of version 2.1, Postfix can be configured to delegate access policy
+ decisions to an external server that runs outside Postfix. See the
file <a href="SMTPD_POLICY_README.html">SMTPD_POLICY_README</a> for more information.
<b><a href="postconf.5.html#smtpd_policy_service_max_idle">smtpd_policy_service_max_idle</a> (300s)</b>
- The time after which an idle SMTPD policy service connection is
+ The time after which an idle SMTPD policy service connection is
closed.
<b><a href="postconf.5.html#smtpd_policy_service_max_ttl">smtpd_policy_service_max_ttl</a> (1000s)</b>
- The time after which an active SMTPD policy service connection
+ The time after which an active SMTPD policy service connection
is closed.
<b><a href="postconf.5.html#smtpd_policy_service_timeout">smtpd_policy_service_timeout</a> (100s)</b>
- The time limit for connecting to, writing to, or receiving from
+ The time limit for connecting to, writing to, or receiving from
a delegated SMTPD policy server.
Available in Postfix version 3.0 and later:
The default action when an SMTPD policy service request fails.
<b><a href="postconf.5.html#smtpd_policy_service_request_limit">smtpd_policy_service_request_limit</a> (0)</b>
- The maximal number of requests per SMTPD policy service connec-
+ The maximal number of requests per SMTPD policy service connec-
tion, or zero (no limit).
<b><a href="postconf.5.html#smtpd_policy_service_try_limit">smtpd_policy_service_try_limit</a> (2)</b>
- The maximal number of attempts to send an SMTPD policy service
+ The maximal number of attempts to send an SMTPD policy service
request before giving up.
<b><a href="postconf.5.html#smtpd_policy_service_retry_delay">smtpd_policy_service_retry_delay</a> (1s)</b>
- The delay between attempts to resend a failed SMTPD policy ser-
+ The delay between attempts to resend a failed SMTPD policy ser-
vice request.
Available in Postfix version 3.1 and later:
<b><a href="postconf.5.html#smtpd_policy_service_policy_context">smtpd_policy_service_policy_context</a> (empty)</b>
- Optional information that the Postfix SMTP server specifies in
- the "policy_context" attribute of a policy service request
- (originally, to share the same service endpoint among multiple
+ Optional information that the Postfix SMTP server specifies in
+ the "policy_context" attribute of a policy service request
+ (originally, to share the same service endpoint among multiple
<a href="postconf.5.html#check_policy_service">check_policy_service</a> clients).
<b>ACCESS CONTROLS</b>
- The <a href="SMTPD_ACCESS_README.html">SMTPD_ACCESS_README</a> document gives an introduction to all the SMTP
+ The <a href="SMTPD_ACCESS_README.html">SMTPD_ACCESS_README</a> document gives an introduction to all the SMTP
server access control features.
<b><a href="postconf.5.html#smtpd_delay_reject">smtpd_delay_reject</a> (yes)</b>
- Wait until the RCPT TO command before evaluating
+ Wait until the RCPT TO command before evaluating
$<a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a>, $<a href="postconf.5.html#smtpd_helo_restrictions">smtpd_helo_restrictions</a> and
$<a href="postconf.5.html#smtpd_sender_restrictions">smtpd_sender_restrictions</a>, or wait until the ETRN command
- before evaluating $<a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a> and
+ before evaluating $<a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a> and
$<a href="postconf.5.html#smtpd_helo_restrictions">smtpd_helo_restrictions</a>.
<b><a href="postconf.5.html#parent_domain_matches_subdomains">parent_domain_matches_subdomains</a> (see 'postconf -d' output)</b>
- A list of Postfix features where the pattern "example.com" also
- matches subdomains of example.com, instead of requiring an
+ A list of Postfix features where the pattern "example.com" also
+ matches subdomains of example.com, instead of requiring an
explicit ".example.com" pattern.
<b><a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server applies in
+ Optional restrictions that the Postfix SMTP server applies in
the context of a client connection request.
<b><a href="postconf.5.html#smtpd_helo_required">smtpd_helo_required</a> (no)</b>
- Require that a remote SMTP client introduces itself with the
- HELO or EHLO command before sending the MAIL command or other
+ Require that a remote SMTP client introduces itself with the
+ HELO or EHLO command before sending the MAIL command or other
commands that require EHLO negotiation.
<b><a href="postconf.5.html#smtpd_helo_restrictions">smtpd_helo_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server applies in
+ Optional restrictions that the Postfix SMTP server applies in
the context of a client HELO command.
<b><a href="postconf.5.html#smtpd_sender_restrictions">smtpd_sender_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server applies in
+ Optional restrictions that the Postfix SMTP server applies in
the context of a client MAIL FROM command.
<b><a href="postconf.5.html#smtpd_recipient_restrictions">smtpd_recipient_restrictions</a> (see 'postconf -d' output)</b>
- Optional restrictions that the Postfix SMTP server applies in
- the context of a client RCPT TO command, after
+ Optional restrictions that the Postfix SMTP server applies in
+ the context of a client RCPT TO command, after
<a href="postconf.5.html#smtpd_relay_restrictions">smtpd_relay_restrictions</a>.
<b><a href="postconf.5.html#smtpd_etrn_restrictions">smtpd_etrn_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server applies in
+ Optional restrictions that the Postfix SMTP server applies in
the context of a client ETRN command.
<b><a href="postconf.5.html#allow_untrusted_routing">allow_untrusted_routing</a> (no)</b>
- Forward mail with sender-specified routing
- (user[@%!]remote[@%!]site) from untrusted clients to destina-
+ Forward mail with sender-specified routing
+ (user[@%!]remote[@%!]site) from untrusted clients to destina-
tions matching $<a href="postconf.5.html#relay_domains">relay_domains</a>.
<b><a href="postconf.5.html#smtpd_restriction_classes">smtpd_restriction_classes</a> (empty)</b>
User-defined aliases for groups of access restrictions.
<b><a href="postconf.5.html#smtpd_null_access_lookup_key">smtpd_null_access_lookup_key</a> (</b><><b>)</b>
- The lookup key to be used in SMTP <a href="access.5.html"><b>access</b>(5)</a> tables instead of
+ The lookup key to be used in SMTP <a href="access.5.html"><b>access</b>(5)</a> tables instead of
the null sender address.
<b><a href="postconf.5.html#permit_mx_backup_networks">permit_mx_backup_networks</a> (empty)</b>
- Restrict the use of the <a href="postconf.5.html#permit_mx_backup">permit_mx_backup</a> SMTP access feature to
+ Restrict the use of the <a href="postconf.5.html#permit_mx_backup">permit_mx_backup</a> SMTP access feature to
only domains whose primary MX hosts match the listed networks.
Available in Postfix version 2.0 and later:
applies in the context of the SMTP DATA command.
<b><a href="postconf.5.html#smtpd_expansion_filter">smtpd_expansion_filter</a> (see 'postconf -d' output)</b>
- What characters are allowed in $name expansions of RBL reply
+ What characters are allowed in $name expansions of RBL reply
templates.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_reject_unlisted_sender">smtpd_reject_unlisted_sender</a> (no)</b>
- Request that the Postfix SMTP server rejects mail from unknown
- sender
addresses, even when no explicit <a href="postconf.5.html#reject_unlisted_sender">reject_unlisted_sender</a>
+ Request that the Postfix SMTP server rejects mail from unknown
+ sender
addresses, even when no explicit <a href="postconf.5.html#reject_unlisted_sender">reject_unlisted_sender</a>
access restriction is specified.
<b><a href="postconf.5.html#smtpd_reject_unlisted_recipient">smtpd_reject_unlisted_recipient</a> (yes)</b>
- Request that the Postfix SMTP server rejects mail for unknown
- recipient addresses, even when no explicit
+ Request that the Postfix SMTP server rejects mail for unknown
+ recipient addresses, even when no explicit
<a href="postconf.5.html#reject_unlisted_recipient">reject_unlisted_recipient</a> access restriction is specified.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtpd_relay_restrictions">smtpd_relay_restrictions</a> (<a href="postconf.5.html#permit_mynetworks">permit_mynetworks</a>, <a href="postconf.5.html#permit_sasl_authenticated">permit_sasl_authenticated</a>,</b>
<b><a href="postconf.5.html#defer_unauth_destination">defer_unauth_destination</a>)</b>
Access restrictions for mail relay control that the Postfix SMTP
- server applies in the context of the RCPT TO command, before
+ server applies in the context of the RCPT TO command, before
<a href="postconf.5.html#smtpd_recipient_restrictions">smtpd_recipient_restrictions</a>.
<b>SENDER AND RECIPIENT ADDRESS VERIFICATION CONTROLS</b>
- Postfix version 2.1 introduces sender and recipient address verifica-
+ Postfix version 2.1 introduces sender and recipient address verifica-
tion. This feature is implemented by sending probe email messages that
are not actually delivered. This feature is requested via the
- <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a> and <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> access
- restrictions. The status of verification probes is maintained by the
- <a href="verify.8.html"><b>verify</b>(8)</a> server. See the file <a href="ADDRESS_VERIFICATION_README.html">ADDRESS_VERIFICATION_README</a> for infor-
- mation about how to configure and operate the Postfix sender/recipient
+ <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a> and <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> access
+ restrictions. The status of verification probes is maintained by the
+ <a href="verify.8.html"><b>verify</b>(8)</a> server. See the file <a href="ADDRESS_VERIFICATION_README.html">ADDRESS_VERIFICATION_README</a> for infor-
+ mation about how to configure and operate the Postfix sender/recipient
address verification service.
<b><a href="postconf.5.html#address_verify_poll_count">address_verify_poll_count</a> (normal: 3, overload: 1)</b>
fication request in progress.
<b><a href="postconf.5.html#address_verify_sender">address_verify_sender</a> ($<a href="postconf.5.html#double_bounce_sender">double_bounce_sender</a>)</b>
- The sender address to use in address verification probes; prior
+ The sender address to use in address verification probes; prior
to Postfix 2.5 the default was "postmaster".
<b><a href="postconf.5.html#unverified_sender_reject_code">unverified_sender_reject_code</a> (450)</b>
address is rejected by the <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a> restriction.
<b><a href="postconf.5.html#unverified_recipient_reject_code">unverified_recipient_reject_code</a> (450)</b>
- The numerical Postfix SMTP server response when a recipient
- address is rejected by the <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> restric-
+ The numerical Postfix SMTP server response when a recipient
+ address is rejected by the <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> restric-
tion.
Available in Postfix version 2.6 and later:
<b><a href="postconf.5.html#unverified_sender_defer_code">unverified_sender_defer_code</a> (450)</b>
- The numerical Postfix SMTP server response code when a sender
+ The numerical Postfix SMTP server response code when a sender
address probe fails due to a temporary error condition.
<b><a href="postconf.5.html#unverified_recipient_defer_code">unverified_recipient_defer_code</a> (450)</b>
- The numerical Postfix SMTP server response when a recipient
+ The numerical Postfix SMTP server response when a recipient
address probe fails due to a temporary error condition.
<b><a href="postconf.5.html#unverified_sender_reject_reason">unverified_sender_reject_reason</a> (empty)</b>
<a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a>.
<b><a href="postconf.5.html#unverified_sender_tempfail_action">unverified_sender_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a>)</b>
- The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a>
+ The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a>
fails due to a temporary error condition.
<b><a href="postconf.5.html#unverified_recipient_tempfail_action">unverified_recipient_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a>)</b>
- The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipi</a>-
+ The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipi</a>-
<a href="postconf.5.html#reject_unverified_recipient">ent</a> fails due to a temporary error condition.
Available with Postfix 2.9 and later:
<b><a href="postconf.5.html#address_verify_sender_ttl">address_verify_sender_ttl</a> (0s)</b>
- The time between changes in the time-dependent portion of
+ The time between changes in the time-dependent portion of
address verification probe sender addresses.
<b>ACCESS CONTROL RESPONSES</b>
map "reject" action.
<b><a href="postconf.5.html#defer_code">defer_code</a> (450)</b>
- The numerical Postfix SMTP server response code when a remote
+ The numerical Postfix SMTP server response code when a remote
SMTP client request is rejected by the "defer" restriction.
<b><a href="postconf.5.html#invalid_hostname_reject_code">invalid_hostname_reject_code</a> (501)</b>
- The numerical Postfix SMTP server response code when the client
- HELO or EHLO command parameter is rejected by the
+ The numerical Postfix SMTP server response code when the client
+ HELO or EHLO command parameter is rejected by the
<a href="postconf.5.html#reject_invalid_helo_hostname">reject_invalid_helo_hostname</a> restriction.
<b><a href="postconf.5.html#maps_rbl_reject_code">maps_rbl_reject_code</a> (554)</b>
- The numerical Postfix SMTP server response code when a remote
- SMTP
client request is blocked by the <a href="postconf.5.html#reject_rbl_client">reject_rbl_client</a>,
+ The numerical Postfix SMTP server response code when a remote
+ SMTP
client request is blocked by the <a href="postconf.5.html#reject_rbl_client">reject_rbl_client</a>,
<a href="postconf.5.html#reject_rhsbl_client">reject_rhsbl_client</a>, <a href="postconf.5.html#reject_rhsbl_reverse_client">reject_rhsbl_reverse_client</a>,
<a href="postconf.5.html#reject_rhsbl_sender">reject_rhsbl_sender</a> or <a href="postconf.5.html#reject_rhsbl_recipient">reject_rhsbl_recipient</a> restriction.
<b><a href="postconf.5.html#non_fqdn_reject_code">non_fqdn_reject_code</a> (504)</b>
- The numerical Postfix SMTP server reply code when a client
- request
is rejected by the <a href="postconf.5.html#reject_non_fqdn_helo_hostname">reject_non_fqdn_helo_hostname</a>,
+ The numerical Postfix SMTP server reply code when a client
+ request
is rejected by the <a href="postconf.5.html#reject_non_fqdn_helo_hostname">reject_non_fqdn_helo_hostname</a>,
<a href="postconf.5.html#reject_non_fqdn_sender">reject_non_fqdn_sender</a> or <a href="postconf.5.html#reject_non_fqdn_recipient">reject_non_fqdn_recipient</a> restriction.
<b><a href="postconf.5.html#plaintext_reject_code">plaintext_reject_code</a> (450)</b>
- The numerical Postfix SMTP server response code when a request
+ The numerical Postfix SMTP server response code when a request
is rejected by the <b><a href="postconf.5.html#reject_plaintext_session">reject_plaintext_session</a></b> restriction.
<b><a href="postconf.5.html#reject_code">reject_code</a> (554)</b>
- The numerical Postfix SMTP server response code when a remote
+ The numerical Postfix SMTP server response code when a remote
SMTP client request is rejected by the "reject" restriction.
<b><a href="postconf.5.html#relay_domains_reject_code">relay_domains_reject_code</a> (554)</b>
- The numerical Postfix SMTP server response code when a client
- request is rejected by the <a href="postconf.5.html#reject_unauth_destination">reject_unauth_destination</a> recipient
+ The numerical Postfix SMTP server response code when a client
+ request is rejected by the <a href="postconf.5.html#reject_unauth_destination">reject_unauth_destination</a> recipient
restriction.
<b><a href="postconf.5.html#unknown_address_reject_code">unknown_address_reject_code</a> (450)</b>
a sender or recipient address because its domain is unknown.
<b><a href="postconf.5.html#unknown_client_reject_code">unknown_client_reject_code</a> (450)</b>
- The numerical Postfix SMTP server response code when a client
- without valid address <=> name mapping is rejected by the
+ The numerical Postfix SMTP server response code when a client
+ without valid address <=> name mapping is rejected by the
<a href="postconf.5.html#reject_unknown_client_hostname">reject_unknown_client_hostname</a> restriction.
<b><a href="postconf.5.html#unknown_hostname_reject_code">unknown_hostname_reject_code</a> (450)</b>
- The numerical Postfix SMTP server response code when the host-
- name specified with the HELO or EHLO command is rejected by the
+ The numerical Postfix SMTP server response code when the host-
+ name specified with the HELO or EHLO command is rejected by the
<a href="postconf.5.html#reject_unknown_helo_hostname">reject_unknown_helo_hostname</a> restriction.
Available in Postfix version 2.0 and later:
<b><a href="postconf.5.html#default_rbl_reply">default_rbl_reply</a> (see 'postconf -d' output)</b>
- The default Postfix SMTP server response template for a request
+ The default Postfix SMTP server response template for a request
that is rejected by an RBL-based restriction.
<b><a href="postconf.5.html#multi_recipient_bounce_reject_code">multi_recipient_bounce_reject_code</a> (550)</b>
- The numerical Postfix SMTP server response code when a remote
- SMTP
client request is blocked by the <a href="postconf.5.html#reject_multi_recipient_bounce">reject_multi_recipi</a>-
+ The numerical Postfix SMTP server response code when a remote
+ SMTP
client request is blocked by the <a href="postconf.5.html#reject_multi_recipient_bounce">reject_multi_recipi</a>-
<a href="postconf.5.html#reject_multi_recipient_bounce">ent_bounce</a> restriction.
<b><a href="postconf.5.html#rbl_reply_maps">rbl_reply_maps</a> (empty)</b>
<b><a href="postconf.5.html#access_map_defer_code">access_map_defer_code</a> (450)</b>
The numerical Postfix SMTP server response code for an <a href="access.5.html"><b>access</b>(5)</a>
- map "defer" action, including "<a href="postconf.5.html#defer_if_permit">defer_if_permit</a>" or
+ map "defer" action, including "<a href="postconf.5.html#defer_if_permit">defer_if_permit</a>" or
"<a href="postconf.5.html#defer_if_reject">defer_if_reject</a>".
<b><a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a> (<a href="postconf.5.html#defer_if_permit">defer_if_permit</a>)</b>
- The Postfix SMTP server's action when a reject-type restriction
+ The Postfix SMTP server's action when a reject-type restriction
fails due to a temporary error condition.
<b><a href="postconf.5.html#unknown_helo_hostname_tempfail_action">unknown_helo_hostname_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a>)</b>
- The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unknown_helo_hostname">reject_unknown_helo_host</a>-
+ The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unknown_helo_hostname">reject_unknown_helo_host</a>-
<a href="postconf.5.html#reject_unknown_helo_hostname">name</a> fails due to a temporary error condition.
<b><a href="postconf.5.html#unknown_address_tempfail_action">unknown_address_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a>)</b>
- The Postfix SMTP server's action when
- <a href="postconf.5.html#reject_unknown_sender_domain">reject_unknown_sender_domain</a>
or <a href="postconf.5.html#reject_unknown_recipient_domain">reject_unknown_recipient_domain</a>
+ The Postfix SMTP server's action when
+ <a href="postconf.5.html#reject_unknown_sender_domain">reject_unknown_sender_domain</a>
or <a href="postconf.5.html#reject_unknown_recipient_domain">reject_unknown_recipient_domain</a>
fail due to a temporary error condition.
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
- The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
+ The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
figuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
- How much time a Postfix daemon process may take to handle a
+ How much time a Postfix daemon process may take to handle a
request before it is terminated by a built-in watchdog timer.
<b><a href="postconf.5.html#command_directory">command_directory</a> (see 'postconf -d' output)</b>
The location of all postfix administrative commands.
<b><a href="postconf.5.html#double_bounce_sender">double_bounce_sender</a> (double-bounce)</b>
- The sender address of postmaster notifications that are gener-
+ The sender address of postmaster notifications that are gener-
ated by the mail system.
<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
- The time limit for sending or receiving information over an
+ The time limit for sending or receiving information over an
internal communication channel.
<b><a href="postconf.5.html#mail_name">mail_name</a> (Postfix)</b>
- The mail system name that is displayed in Received: headers, in
+ The mail system name that is displayed in Received: headers, in
the SMTP greeting banner, and in bounced mail.
<b><a href="postconf.5.html#mail_owner">mail_owner</a> (postfix)</b>
- The UNIX system account that owns the Postfix queue and most
+ The UNIX system account that owns the Postfix queue and most
Postfix daemon processes.
<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
- The maximum amount of time that an idle Postfix daemon process
+ The maximum amount of time that an idle Postfix daemon process
waits for an incoming connection before terminating voluntarily.
<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
The internet hostname of this mail system.
<b><a href="postconf.5.html#mynetworks">mynetworks</a> (see 'postconf -d' output)</b>
- The list of "trusted" remote SMTP clients that have more privi-
+ The list of "trusted" remote SMTP clients that have more privi-
leges than "strangers".
<b><a href="postconf.5.html#myorigin">myorigin</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
- The domain name that locally-posted mail appears to come from,
+ The domain name that locally-posted mail appears to come from,
and that locally posted mail is delivered to.
<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
The location of the Postfix top-level queue directory.
<b><a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a> (empty)</b>
- The set of characters that can separate an email address local-
+ The set of characters that can separate an email address local-
part, user name, or a .forward file name from its extension.
<b><a href="postconf.5.html#smtpd_banner">smtpd_banner</a> ($<a href="postconf.5.html#myhostname">myhostname</a> ESMTP $<a href="postconf.5.html#mail_name">mail_name</a>)</b>
- The text that follows the 220 status code in the SMTP greeting
+ The text that follows the 220 status code in the SMTP greeting
banner.
<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
- A prefix that is prepended to the process name in syslog
+ A prefix that is prepended to the process name in syslog
records, so that, for example, "smtpd" becomes "prefix/smtpd".
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtpd_forbidden_commands">smtpd_forbidden_commands</a> (CONNECT, GET, POST)</b>
- List of commands that cause the Postfix SMTP server to immedi-
+ List of commands that cause the Postfix SMTP server to immedi-
ately terminate the session with a 221 code.
Available in Postfix version 2.5 and later:
Available in Postfix 3.4 and later:
<b><a href="postconf.5.html#smtpd_reject_footer_maps">smtpd_reject_footer_maps</a> (empty)</b>
- Lookup tables, indexed by the complete Postfix SMTP server 4xx
+ Lookup tables, indexed by the complete Postfix SMTP server 4xx
or 5xx response, with reject footer templates.
<b>SEE ALSO</b>
The default time unit is s (seconds).
.PP
This feature is available in Postfix 2.1 and later.
+.SH known_tcp_ports (default: lmtp=24, smtp=25, smtps=submissions=465, submission=587)
+Optional setting that avoids lookups in the \fBservices\fR(5) database.
+This feature was implemented to address inconsistencies in the name
+of the port "465" service. The ABNF is:
+.sp
+.in +4
+known_tcp_ports = empty | name\-to\-port *("," name\-to\-port)
+.br
+name\-to\-port = 1*(service\-name "=') port\-number
+.in -4
+.PP
+Whitespace is optional but it cannot appear inside a service
+name or port number.
+.PP
+This feature is available in Postfix 3.6 and later.
.SH line_length_limit (default: 2048)
Upon input, long lines are chopped up into pieces of at most
this length; upon delivery, long lines are reconstructed.
Available in Postfix 3.3 and later:
.IP "\fBservice_name (read\-only)\fR"
The master.cf service name of a Postfix daemon process.
+.PP
+Available in Postfix 3.6 and later:
+.IP "\fBknown_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submission=587)\fR"
+Optional setting that avoids lookups in the \fBservices\fR(5) database.
.SH "FILES"
.na
.nf
The DNS query type (default: "ns") and DNS query name (default:
".") that Postfix may use to determine whether DNSSEC validation
is available.
+.IP "\fBknown_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submission=587)\fR"
+Optional setting that avoids lookups in the \fBservices\fR(5) database.
.SH "MIME PROCESSING CONTROLS"
.na
.nf
Available in Postfix version 3.6 and later:
.IP "\fBsmtpd_relay_before_recipient_restrictions (see 'postconf -d' output)\fR"
Evaluate smtpd_relay_restrictions before smtpd_recipient_restrictions.
+.IP "\fBknown_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submission=587)\fR"
+Optional setting that avoids lookups in the \fBservices\fR(5) database.
.SH "ADDRESS REWRITING CONTROLS"
.na
.nf
use 'allowlist', 'denylist', and variations of those words. </p>
<p> This feature is available in Postfix 3.6 and later. </p>
+
+%PARAM known_tcp_ports lmtp=24, smtp=25, smtps=submissions=465, submission=587
+
+<p> Optional setting that avoids lookups in the services(5) database.
+This feature was implemented to address inconsistencies in the name
+of the port "465" service. The ABNF is:
+</p>
+
+<blockquote>
+<p>
+known_tcp_ports = empty | name-to-port *("," name-to-port) <br>
+name-to-port = 1*(service-name "=') port-number
+</p>
+</blockquote>
+
+<p> Whitespace is optional but it cannot appear inside a service
+name or port number. </p>
+
+<p> This feature is available in Postfix 3.6 and later. </p>
mail_addr_form.c quote_flags.c maillog_client.c \
normalize_mailhost_addr.c map_search.c reject_deliver_request.c \
info_log_addr_form.c sasl_mech_filter.c login_sender_match.c \
- test_main.c compat_level.c
+ test_main.c compat_level.c config_known_tcp_ports.c
OBJS = abounce.o anvil_clnt.o been_here.o bounce.o bounce_log.o \
canon_addr.o cfg_parser.o cleanup_strerror.o cleanup_strflags.o \
clnt_stream.o conv_time.o db_common.o debug_peer.o debug_process.o \
$(NON_PLUGIN_MAP_OBJ) mail_addr_form.o quote_flags.o maillog_client.o \
normalize_mailhost_addr.o map_search.o reject_deliver_request.o \
info_log_addr_form.o sasl_mech_filter.o login_sender_match.o \
- test_main.o compat_level.o
+ test_main.o compat_level.o config_known_tcp_ports.o
# MAP_OBJ is for maps that may be dynamically loaded with dynamicmaps.cf.
# When hard-linking these maps, makedefs sets NON_PLUGIN_MAP_OBJ=$(MAP_OBJ),
# otherwise it sets the PLUGIN_* macros.
attr_override.h mail_parm_split.h midna_adomain.h mail_addr_form.h \
maillog_client.h normalize_mailhost_addr.h map_search.h \
info_log_addr_form.h sasl_mech_filter.h login_sender_match.h \
- test_main.h compat_level.h
+ test_main.h compat_level.h config_known_tcp_ports.h
TESTSRC = rec2stream.c stream2rec.c recdump.c
DEFS = -I. -I$(INC_DIR) -D$(SYSTYPE)
CFLAGS = $(DEBUG) $(OPT) $(DEFS)
mail_version mail_dict server_acl uxtext mail_parm_split \
fold_addr smtp_reply_footer mail_addr_map normalize_mailhost_addr \
haproxy_srvr map_search delivered_hdr login_sender_match \
- compat_level
+ compat_level config_known_tcp_ports
LIBS = ../../lib/lib$(LIB_PREFIX)util$(LIB_SUFFIX)
LIB_DIR = ../../lib
compat_level: compat_level.c $(LIB) $(LIBS)
$(CC) $(CFLAGS) -DTEST -o $@ $@.c $(LIB) $(LIBS) $(SYSLIBS)
+config_known_tcp_ports: config_known_tcp_ports.c $(LIB) $(LIBS)
+ $(CC) $(CFLAGS) -DTEST -o $@ $@.c $(LIB) $(LIBS) $(SYSLIBS)
+
tests: tok822_test mime_tests strip_addr_test tok822_limit_test \
xtext_test scache_multi_test ehlo_mask_test \
namadr_list_test mail_conf_time_test header_body_checks_tests \
smtp_reply_footer_test off_cvt_test mail_addr_crunch_test \
mail_addr_find_test mail_addr_map_test quote_822_local_test \
normalize_mailhost_addr_test haproxy_srvr_test map_search_test \
- delivered_hdr_test login_sender_match_test compat_level_test
+ delivered_hdr_test login_sender_match_test compat_level_test \
+ config_known_tcp_ports_test
mime_tests: mime_test mime_nest mime_8bit mime_dom mime_trunc mime_cvt \
mime_cvt2 mime_cvt3 mime_garb1 mime_garb2 mime_garb3 mime_garb4
diff compat_level_convert.ref compat_level_convert.tmp
rm -f compat_level_convert.tmp
+config_known_tcp_ports_test: update config_known_tcp_ports \
+ config_known_tcp_ports.ref
+ -$(SHLIB_ENV) $(VALGRIND) ./config_known_tcp_ports \
+ >config_known_tcp_ports.tmp 2>&1
+ diff config_known_tcp_ports.ref config_known_tcp_ports.tmp
+ rm -f config_known_tcp_ports.tmp
+
printfck: $(OBJS) $(PROG)
rm -rf printfck
mkdir printfck
compat_level.o: ../../include/vstring.h
compat_level.o: compat_level.c
compat_level.o: compat_level.h
+config_known_tcp_ports.o: ../../include/argv.h
+config_known_tcp_ports.o: ../../include/check_arg.h
+config_known_tcp_ports.o: ../../include/known_tcp_ports.h
+config_known_tcp_ports.o: ../../include/msg.h
+config_known_tcp_ports.o: ../../include/mymalloc.h
+config_known_tcp_ports.o: ../../include/stringops.h
+config_known_tcp_ports.o: ../../include/sys_defs.h
+config_known_tcp_ports.o: ../../include/vbuf.h
+config_known_tcp_ports.o: ../../include/vstring.h
+config_known_tcp_ports.o: config_known_tcp_ports.c
+config_known_tcp_ports.o: config_known_tcp_ports.h
conv_time.o: ../../include/msg.h
conv_time.o: ../../include/sys_defs.h
conv_time.o: conv_time.c
mail_stream.o: mail_stream.h
mail_stream.o: opened.h
mail_task.o: ../../include/check_arg.h
-mail_task.o: ../../include/msg.h
mail_task.o: ../../include/safe.h
mail_task.o: ../../include/sys_defs.h
mail_task.o: ../../include/vbuf.h
--- /dev/null
+/*++
+/* NAME
+/* config_known_tcp_ports 3
+/* SUMMARY
+/* parse and store known TCP port configuration
+/* SYNOPSIS
+/* #include <config_known_tcp_ports.h>
+/*
+/* void config_known_tcp_ports(
+/* const char *source,
+/* const char *settings);
+/* DESCRIPTION
+/* config_known_tcp_ports() parses the known TCP port information
+/* in the settings argument, and reports any warnings to the standard
+/* error stream. The source argument is used to provide warning
+/* context. It typically is a configuration parameter name.
+/* .SH EXPECTED SYNTAX (ABNF)
+/* configuration = empty | name-to-port *("," name-to-port)
+/* name-to-port = 1*(name "=") port
+/* SH EXAMPLES
+/* In the example below, the whitespace is optional.
+/* smtp = 25, smtps = submissions = 465, submission = 587
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+ /*
+ * System library.
+ */
+#include <sys_defs.h>
+
+ /*
+ * Utility library.
+ */
+#include <argv.h>
+#include <known_tcp_ports.h>
+#include <msg.h>
+#include <mymalloc.h>
+#include <stringops.h>
+
+ /*
+ * Application-specific.
+ */
+#include <config_known_tcp_ports.h>
+
+/* config_known_tcp_ports - parse configuration and store associations */
+
+void config_known_tcp_ports(const char *source, const char *settings)
+{
+ ARGV *associations;
+ ARGV *association;
+ char **cpp;
+
+ /*
+ * The settings is in the form of associations separated by comma. Split
+ * it into separate associations.
+ */
+ associations = argv_split(settings, ",");
+ if (associations->argc == 0) {
+ argv_free(associations);
+ return;
+ }
+
+ /*
+ * Each association is in the form of "1*(name =) port". We use
+ * argv_split() to carve this up, then we use mystrtok() to validate the
+ * individual fragments. But first we prepend and append space so that we
+ * get sensible results when an association starts or ends in "=".
+ */
+ for (cpp = associations->argv; *cpp != 0; cpp++) {
+ char *temp = concatenate(" ", *cpp, " ", (char *) 0);
+
+ association = argv_split(temp, "=");
+ myfree(temp);
+
+ if (association->argc == 0) {
+ /* empty, ignore */ ;
+ } else if (association->argc == 1) {
+ msg_warn("%s: in \"%s\" is not in \"name = value\" form",
+ source, *cpp);
+ } else {
+ char *bp;
+ char *lhs;
+ char *rhs;
+ const char *err = 0;
+ int n;
+
+ bp = association->argv[association->argc - 1];
+ if ((rhs = mystrtok(&bp, CHARS_SPACE)) == 0) {
+ err = "missing port value after \"=\"";
+ } else if (mystrtok(&bp, CHARS_SPACE) != 0) {
+ err = "whitespace in port number";
+ } else {
+ for (n = 0; n < association->argc - 1; n++) {
+ const char *new_err;
+
+ bp = association->argv[n];
+ if ((lhs = mystrtok(&bp, CHARS_SPACE)) == 0) {
+ new_err = "missing service name before \"=\"";
+ } else if (mystrtok(&bp, CHARS_SPACE) != 0) {
+ new_err = "whitespace in service name";
+ } else {
+ new_err = add_known_tcp_port(lhs, rhs);
+ }
+ if (new_err != 0 && err == 0)
+ err = new_err;
+ }
+ }
+ if (err != 0) {
+ msg_warn("%s: in \"%s\": %s", source, *cpp, err);
+ }
+ }
+ argv_free(association);
+ }
+ argv_free(associations);
+}
+
+#ifdef TEST
+
+#include <stdlib.h>
+#include <string.h>
+#include <msg_vstream.h>
+
+#define STR(x) vstring_str(x)
+
+ /* TODO(wietse) make this a proper VSTREAM interface */
+
+/* vstream_swap - kludge to capture output for testing */
+
+static void vstream_swap(VSTREAM *one, VSTREAM *two)
+{
+ VSTREAM save;
+
+ save = *one;
+ *one = *two;
+ *two = save;
+}
+
+struct test_case {
+ const char *label; /* identifies test case */
+ const char *config; /* configuration under test */
+ const char *exp_warning; /* expected warning or null */
+ const char *exp_export; /* expected export or null */
+};
+
+static struct test_case test_cases[] = {
+ {"good",
+ /* config */ "smtp = 25, smtps = submissions = 465, lmtp = 24",
+ /* warning */ "",
+ /* export */ "lmtp=24 smtp=25 smtps=465 submissions=465"
+ },
+ {"port test 1",
+ /* config */ "smtps = submission =",
+ /* warning */ "config_known_tcp_ports: warning: port test 1: "
+ "in \"smtps = submission =\": missing port value after \"=\"\n",
+ /* export */ ""
+ },
+ {"port test 2",
+ /* config */ "smtps = submission = 4 65",
+ /* warning */ "config_known_tcp_ports: warning: port test 2: "
+ "in \"smtps = submission = 4 65\": whitespace in port number\n",
+ /* export */ ""
+ },
+ {"port test 3",
+ /* config */ "lmtp = 24, smtps = submission = foo",
+ /* warning */ "config_known_tcp_ports: warning: port test 3: "
+ "in \" smtps = submission = foo\": non-numerical service port\n",
+ /* export */ "lmtp=24"
+ },
+ {"service name test 1",
+ /* config */ "smtps = sub mission = 465",
+ /* warning */ "config_known_tcp_ports: warning: service name test 1: "
+ "in \"smtps = sub mission = 465\": whitespace in service name\n",
+ /* export */ "smtps=465"
+ },
+ {"service name test 2",
+ /* config */ "lmtp = 24, smtps = 1234 = submissions = 465",
+ /* warning */ "config_known_tcp_ports: warning: service name test 2: "
+ "in \" smtps = 1234 = submissions = 465\": numerical service name\n",
+ /* export */ "lmtp=24 smtps=465 submissions=465"
+ },
+ 0,
+};
+
+int main(int argc, char **argv)
+{
+ VSTRING *export_buf;
+ struct test_case *tp;
+ int pass = 0;
+ int fail = 0;
+ int test_failed;
+ const char *export;
+ VSTRING *msg_buf;
+ VSTREAM *memory_stream;
+
+#define STRING_OR_NULL(s) ((s) ? (s) : "(null)")
+
+ msg_vstream_init("config_known_tcp_ports", VSTREAM_ERR);
+
+ export_buf = vstring_alloc(100);
+ msg_buf = vstring_alloc(100);
+ for (tp = test_cases; tp->label != 0; tp++) {
+ test_failed = 0;
+ if ((memory_stream = vstream_memopen(msg_buf, O_WRONLY)) == 0)
+ msg_fatal("open memory stream: %m");
+ vstream_swap(VSTREAM_ERR, memory_stream);
+ config_known_tcp_ports(tp->label, tp->config);
+ vstream_swap(memory_stream, VSTREAM_ERR);
+ if (vstream_fclose(memory_stream))
+ msg_fatal("close memory stream: %m");
+ if (strcmp(STR(msg_buf), tp->exp_warning) != 0) {
+ msg_warn("test case %s: got error: \"%s\", want: \"%s\"",
+ tp->label, STR(msg_buf),
+ STRING_OR_NULL(tp->exp_warning));
+ test_failed = 1;
+ } else {
+ export = export_known_tcp_ports(export_buf);
+ if (strcmp(export, tp->exp_export) != 0) {
+ msg_warn("test case %s: got export: \"%s\", want: \"%s\"",
+ tp->label, export, tp->exp_export);
+ test_failed = 1;
+ }
+ clear_known_tcp_ports();
+ VSTRING_RESET(msg_buf);
+ VSTRING_TERMINATE(msg_buf);
+ }
+ if (test_failed) {
+ msg_info("%s: FAIL", tp->label);
+ fail++;
+ } else {
+ msg_info("%s: PASS", tp->label);
+ pass++;
+ }
+ }
+ msg_info("PASS=%d FAIL=%d", pass, fail);
+ vstring_free(msg_buf);
+ vstring_free(export_buf);
+ exit(fail != 0);
+}
+
+#endif
--- /dev/null
+#ifndef _CONFIG_KNOWN_TCP_PORTS_H_INCLUDED_
+#define _CONFIG_KNOWN_TCP_PORTS_H_INCLUDED_
+
+/*++
+/* NAME
+/* config_known_tcp_ports 3h
+/* SUMMARY
+/* parse and store known TCP port configuration
+/* SYNOPSIS
+/* #include <config_known_tcp_ports.h>
+/* DESCRIPTION
+/* .nf
+
+ /*
+ * External interface.
+ */
+extern void config_known_tcp_ports(const char *source, const char *settings);
+
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+#endif
--- /dev/null
+config_known_tcp_ports: good: PASS
+config_known_tcp_ports: port test 1: PASS
+config_known_tcp_ports: port test 2: PASS
+config_known_tcp_ports: port test 3: PASS
+config_known_tcp_ports: service name test 1: PASS
+config_known_tcp_ports: service name test 2: PASS
+config_known_tcp_ports: PASS=6 FAIL=0
/* char *var_dnssec_probe;
/* bool var_relay_before_rcpt_checks;
/* bool var_respectful_logging;
+/* char *var_known_tcp_ports;
/* DESCRIPTION
/* This module (actually the associated include file) defines
/* the names and defaults of all mail configuration parameters.
char *var_dnssec_probe;
bool var_respectful_logging;
+char *var_known_tcp_ports;
const char null_format_string[1] = "";
VAR_MAILLOG_FILE_STAMP, DEF_MAILLOG_FILE_STAMP, &var_maillog_file_stamp, 1, 0,
VAR_POSTLOG_SERVICE, DEF_POSTLOG_SERVICE, &var_postlog_service, 1, 0,
VAR_DNSSEC_PROBE, DEF_DNSSEC_PROBE, &var_dnssec_probe, 0, 0,
+ VAR_KNOWN_TCP_PORTS, DEF_KNOWN_TCP_PORTS, &var_known_tcp_ports, 0, 0,
0,
};
static const CONFIG_BOOL_TABLE first_bool_defaults[] = {
#define DEF_DNSSEC_PROBE "ns:."
extern char *var_dnssec_probe;
+ /*
+ * Pre-empt services(5) lookups.
+ */
+#define VAR_KNOWN_TCP_PORTS "known_tcp_ports"
+#define DEF_KNOWN_TCP_PORTS \
+ "lmtp=24, smtp=25, smtps=submissions=465, submission=587"
+extern char *var_known_tcp_ports;
+
/* LICENSE
/* .ad
/* .fi
* Patches change both the patchlevel and the release date. Snapshots have no
* patchlevel; they change the release date only.
*/
-#define MAIL_RELEASE_DATE "20210411"
+#define MAIL_RELEASE_DATE "20210418"
#define MAIL_VERSION_NUMBER "3.6"
#ifdef SNAPSHOT
dummy/168.100.3.2: NO
dummy/168.100.3.3: YES
dummy/168.100.3.16: NO
-./namadr_list: warning: command line: bad net/mask pattern: "168.100.3.0/98"
+./namadr_list: warning: command line: bad mask length in "168.100.3.0/98"
dummy/168.100.3.16: ERROR
-./namadr_list: warning: command line: bad net/mask pattern: "168.100.589.0/28"
+./namadr_list: warning: command line: bad network value in "168.100.589.0/28"
dummy/168.100.3.16: ERROR
dummy/168.100.989.16: NO
./namadr_list: error: unsupported dictionary type: 2001
bar/168.100.3.3: NO
baz/168.100.3.3: YES
x.x.x/127.0.0.1: NO
-./namadr_list: warning: command line: bad net/mask pattern: "be/be"
+./namadr_list: warning: command line: bad mask value in "be/be"
x.x.x/127.0.0.1: ERROR
x.x.x/127.0.0.1: NO
./namadr_list: warning: command line: bad address pattern: "be:be"
/* Available in Postfix 3.3 and later:
/* .IP "\fBservice_name (read-only)\fR"
/* The master.cf service name of a Postfix daemon process.
+/* .PP
+/* Available in Postfix 3.6 and later:
+/* .IP "\fBknown_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submission=587)\fR"
+/* Optional setting that avoids lookups in the \fBservices\fR(5) database.
/* FILES
/* .ad
/* .fi
posttls-finger.o: ../../include/htable.h
posttls-finger.o: ../../include/inet_proto.h
posttls-finger.o: ../../include/iostuff.h
+posttls-finger.o: ../../include/known_tcp_ports.h
posttls-finger.o: ../../include/mail_conf.h
posttls-finger.o: ../../include/mail_params.h
posttls-finger.o: ../../include/mail_parm_split.h
#include <sock_addr.h>
#include <midna_domain.h>
#include <clean_env.h>
+#include <known_tcp_ports.h>
#define STR(x) vstring_str(x)
msg_fatal("bad network port in destination: %s", destination);
*portp = htons(port);
} else {
- if ((sp = getservbyname(service, protocol)) != 0)
+ if ((sp = getservbyname(filter_known_tcp_port(service), protocol)) != 0)
*portp = sp->s_port;
else if (strcmp(service, "smtp") == 0)
*portp = htons(25);
smtp_connect.o: ../../include/inet_addr_list.h
smtp_connect.o: ../../include/inet_proto.h
smtp_connect.o: ../../include/iostuff.h
+smtp_connect.o: ../../include/known_tcp_ports.h
smtp_connect.o: ../../include/mail_addr.h
smtp_connect.o: ../../include/mail_error.h
smtp_connect.o: ../../include/mail_params.h
/* The DNS query type (default: "ns") and DNS query name (default:
/* ".") that Postfix may use to determine whether DNSSEC validation
/* is available.
+/* .IP "\fBknown_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submission=587)\fR"
+/* Optional setting that avoids lookups in the \fBservices\fR(5) database.
/* MIME PROCESSING CONTROLS
/* .ad
/* .fi
#include <myaddrinfo.h>
#include <sock_addr.h>
#include <inet_proto.h>
+#include <known_tcp_ports.h>
/* Global library. */
msg_fatal("bad network port in destination: %s", destination);
*portp = htons(port);
} else {
- if ((sp = getservbyname(service, protocol)) == 0)
+ if ((sp = getservbyname(filter_known_tcp_port(service), protocol)) == 0)
msg_fatal("unknown service: %s/%s", service, protocol);
*portp = sp->s_port;
}
/* Available in Postfix version 3.6 and later:
/* .IP "\fBsmtpd_relay_before_recipient_restrictions (see 'postconf -d' output)\fR"
/* Evaluate smtpd_relay_restrictions before smtpd_recipient_restrictions.
+/* .IP "\fBknown_tcp_ports (lmtp=24, smtp=25, smtps=submissions=465, submission=587)\fR"
+/* Optional setting that avoids lookups in the \fBservices\fR(5) database.
/* ADDRESS REWRITING CONTROLS
/* .ad
/* .fi
extpar.c dict_inline.c casefold.c dict_utf8.c strcasecmp_utf8.c \
split_qnameval.c argv_attr_print.c argv_attr_scan.c dict_file.c \
msg_logger.c logwriter.c unix_dgram_connect.c unix_dgram_listen.c \
- byte_mask.c
+ byte_mask.c known_tcp_ports.c
OBJS = alldig.o allprint.o argv.o argv_split.o attr_clnt.o attr_print0.o \
attr_print64.o attr_print_plain.o attr_scan0.o attr_scan64.o \
attr_scan_plain.o auto_clnt.o base64_code.o basename.o binhash.o \
extpar.o dict_inline.o casefold.o dict_utf8.o strcasecmp_utf8.o \
split_qnameval.o argv_attr_print.o argv_attr_scan.o dict_file.o \
msg_logger.o logwriter.o unix_dgram_connect.o unix_dgram_listen.o \
- byte_mask.o
+ byte_mask.o known_tcp_ports.o
# MAP_OBJ is for maps that may be dynamically loaded with dynamicmaps.cf.
# When hard-linking these, makedefs sets NON_PLUGIN_MAP_OBJ=$(MAP_OBJ),
# otherwise it sets the PLUGIN_* macros.
dict_fail.h warn_stat.h dict_sockmap.h line_number.h timecmp.h \
slmdb.h compat_va_copy.h dict_pipe.h dict_random.h \
valid_utf8_hostname.h midna_domain.h dict_union.h dict_inline.h \
- check_arg.h argv_attr.h msg_logger.h logwriter.h byte_mask.h
+ check_arg.h argv_attr.h msg_logger.h logwriter.h byte_mask.h \
+ known_tcp_ports.h
TESTSRC = fifo_open.c fifo_rdwr_bug.c fifo_rdonly_bug.c select_bug.c \
stream_test.c dup2_pass_on_exec.c
DEFS = -I. -D$(SYSTYPE)
myaddrinfo myaddrinfo4 inet_proto sane_basename format_tv \
valid_utf8_string ip_match base32_code msg_rate_delay netstring \
vstream timecmp dict_cache midna_domain casefold strcasecmp_utf8 \
- vbuf_print split_qnameval vstream msg_logger byte_mask
+ vbuf_print split_qnameval vstream msg_logger byte_mask \
+ known_tcp_ports
PLUGIN_MAP_SO = $(LIB_PREFIX)pcre$(LIB_SUFFIX)
LIB_DIR = ../../lib
$(CC) $(CFLAGS) -DTEST -o $@ $@.c $(LIB) $(SYSLIBS)
mv junk $@.o
+known_tcp_ports: $(LIB)
+ mv $@.o junk
+ $(CC) $(CFLAGS) -DTEST -o $@ $@.c $(LIB) $(SYSLIBS)
+ mv junk $@.o
+
tests: all valid_hostname_test mac_expand_test dict_test unescape_test \
hex_quote_test ctable_test inet_addr_list_test base64_code_test \
attr_scan64_test attr_scan0_test dict_pcre_test host_port_test \
vstring_test vstream_test dict_pcre_file_test dict_regexp_file_test \
dict_cidr_file_test dict_static_file_test dict_random_test \
dict_random_file_test dict_inline_file_test byte_mask_tests \
- mystrtok_test
+ mystrtok_test known_tcp_ports_test
root_tests:
diff mystrtok.ref mystrtok.tmp
rm -f mystrtok.tmp
+known_tcp_ports_test: known_tcp_ports known_tcp_ports.ref
+ $(SHLIB_ENV) ${VALGRIND} ./known_tcp_ports >known_tcp_ports.tmp 2>&1
+ diff known_tcp_ports.ref known_tcp_ports.tmp
+ rm -f known_tcp_ports.tmp
+
depend: $(MAKES)
(sed '1,/^# do not edit/!d' Makefile.in; \
set -e; for i in [a-z][a-z0-9]*.c; do \
find_inet.o: check_arg.h
find_inet.o: find_inet.c
find_inet.o: find_inet.h
+find_inet.o: known_tcp_ports.h
find_inet.o: msg.h
find_inet.o: stringops.h
find_inet.o: sys_defs.h
killme_after.o: killme_after.c
killme_after.o: killme_after.h
killme_after.o: sys_defs.h
+known_tcp_ports.o: check_arg.h
+known_tcp_ports.o: htable.h
+known_tcp_ports.o: known_tcp_ports.c
+known_tcp_ports.o: known_tcp_ports.h
+known_tcp_ports.o: mymalloc.h
+known_tcp_ports.o: stringops.h
+known_tcp_ports.o: sys_defs.h
+known_tcp_ports.o: vbuf.h
+known_tcp_ports.o: vstring.h
line_number.o: check_arg.h
line_number.o: line_number.c
line_number.o: line_number.h
load_file.o: vstream.h
load_file.o: warn_stat.h
load_lib.o: load_lib.c
-load_lib.o: load_lib.h
-load_lib.o: msg.h
load_lib.o: sys_defs.h
logwriter.o: check_arg.h
logwriter.o: iostuff.h
mvect.o: sys_defs.h
myaddrinfo.o: check_arg.h
myaddrinfo.o: inet_proto.h
+myaddrinfo.o: known_tcp_ports.h
myaddrinfo.o: msg.h
myaddrinfo.o: myaddrinfo.c
myaddrinfo.o: myaddrinfo.h
#include "msg.h"
#include "stringops.h"
#include "find_inet.h"
+#include "known_tcp_ports.h"
#ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
msg_fatal("bad port number: %s", service);
return (htons(port));
} else {
- if ((sp = getservbyname(service, protocol)) == 0)
+ if ((sp = getservbyname(filter_known_tcp_port(service), protocol)) == 0)
msg_fatal("unknown service: %s/%s", service, protocol);
return (sp->s_port);
}
--- /dev/null
+/*++
+/* NAME
+/* known_tcp_ports 3
+/* SUMMARY
+/* reduce dependency on the services(5) database
+/* SYNOPSIS
+/* #include <known_tcp_ports.h>
+/*
+/* const char *add_known_tcp_port(
+/* const char *name)
+/* const char *port)
+/*
+/* const char *filter_known_tcp_port(
+/* const char *name_or_port)
+/*
+/* void clear_known_tcp_ports(void)
+/* AUXILIARY FUNCTIONS
+/* char *export_known_tcp_ports(
+/* VSTRING *result)
+/* DESCRIPTION
+/* This module reduces dependency on the services(5) database.
+/*
+/* add_known_tcp_port() associates a symbolic name with a numerical
+/* port. The function returns a pointer to error text if the
+/* arguments are malformed or if the symbolic name already has
+/* an association.
+/*
+/* filter_known_tcp_port() returns the argument if it does not
+/* specify a symbolic name, or if the argument specifies a symbolic
+/* name that is not associated with a numerical port. Otherwise,
+/* it returns the associated numerical port.
+/*
+/* clear_known_tcp_ports() destroys all name-number associations.
+/* string.
+/*
+/* export_known_tcp_ports() overwrites a VSTRING with all known
+/* name=port associations, sorted by service name, and separated
+/* by whitespace. The result is pointer to the VSTRING payload.
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+ /*
+ * System library
+ */
+#include <sys_defs.h>
+#include <stdlib.h>
+#include <string.h>
+
+ /*
+ * Utility library
+ */
+#include <htable.h>
+#include <mymalloc.h>
+#include <stringops.h>
+
+ /*
+ * Application-specific.
+ */
+#include <known_tcp_ports.h>
+
+#define STR(x) vstring_str(x)
+
+static HTABLE *known_tcp_ports;
+
+/* add_known_tcp_port - associate symbolic name with numerical port */
+
+const char *add_known_tcp_port(const char *name, const char *port)
+{
+ if (alldig(name))
+ return ("numerical service name");
+ if (!alldig(port))
+ return ("non-numerical service port");
+ if (known_tcp_ports == 0)
+ known_tcp_ports = htable_create(10);
+ if (htable_locate(known_tcp_ports, name) != 0)
+ return ("duplicate service name");
+ (void) htable_enter(known_tcp_ports, name, mystrdup(port));
+ return (0);
+}
+
+/* filter_known_tcp_port - replace argument if associated with known port */
+
+const char *filter_known_tcp_port(const char *name_or_port)
+{
+ HTABLE_INFO *ht;
+
+ if (name_or_port == 0 || known_tcp_ports == 0 || alldig(name_or_port)) {
+ return (name_or_port);
+ } else if ((ht = htable_locate(known_tcp_ports, name_or_port)) != 0) {
+ return (ht->value);
+ } else {
+ return (name_or_port);
+ }
+}
+
+/* clear_known_tcp_ports - destroy all name-port associations */
+
+void clear_known_tcp_ports(void)
+{
+ htable_free(known_tcp_ports, myfree);
+ known_tcp_ports = 0;
+}
+
+/* compare_ht_keys - compare table keys */
+
+static int compare_ht_keys(const void *a, const void *b)
+{
+ HTABLE_INFO **ap = (HTABLE_INFO **) a;
+ HTABLE_INFO **bp = (HTABLE_INFO **) b;
+
+ return (strcmp((const char *) ap[0]->key, (const char *) bp[0]->key));
+}
+
+/* export_known_tcp_ports - sorted dump */
+
+char *export_known_tcp_ports(VSTRING *out)
+{
+ HTABLE_INFO **list;
+ HTABLE_INFO **ht;
+
+ VSTRING_RESET(out);
+ if (known_tcp_ports) {
+ list = htable_list(known_tcp_ports);
+ qsort((void *) list, known_tcp_ports->used, sizeof(*list),
+ compare_ht_keys);
+ for (ht = list; *ht; ht++)
+ vstring_sprintf_append(out, "%s%s=%s", ht > list ? " " : "",
+ ht[0]->key, (const char *) ht[0]->value);
+ myfree((void *) list);
+ }
+ VSTRING_TERMINATE(out);
+ return (STR(out));
+}
+
+#ifdef TEST
+
+#include <msg.h>
+
+struct association {
+ const char *lhs; /* service name */
+ const char *rhs; /* service port */
+};
+
+struct probe {
+ const char *query; /* query */
+ const char *exp_reply; /* expected reply */
+};
+
+struct test_case {
+ const char *label; /* identifies test case */
+ struct association associations[10];
+ const char *exp_err; /* expected error */
+ const char *exp_export; /* expected export output */
+ struct probe probes[10];
+};
+
+struct test_case test_cases[] = {
+ {"good",
+ /* association */ {{"smtp", "25"}, {"lmtp", "24"}, 0},
+ /* error */ 0,
+ /* export */ "lmtp=24 smtp=25",
+ /* probe */ {{"smtp", "25"}, {"1", "1"}, {"x", "x"}, {"lmtp", "24"}, 0}
+ },
+ {"duplicate lhs",
+ /* association */ {{"smtp", "25"}, {"smtp", "100"}, 0},
+ /* error */ "duplicate service name"
+ },
+ {"numerical lhs",
+ /* association */ {{"100", "100"}, 0},
+ /* error */ "numerical service name"
+ },
+ {"symbolic rhs",
+ /* association */ {{"smtp", "lmtp"}, 0},
+ /* error */ "non-numerical service port"
+ },
+ {"uninitialized",
+ /* association */ {0},
+ /* error */ 0,
+ /* export */ "",
+ /* probe */ {{"smtp", "smtp"}, {"1", "1"}, {"x", "x"}, 0}
+ },
+ 0,
+};
+
+int main(int argc, char **argv)
+{
+ VSTRING *export_buf;
+ struct test_case *tp;
+ struct association *ap;
+ struct probe *pp;
+ int pass = 0;
+ int fail = 0;
+ const char *err;
+ int test_failed;
+ const char *reply;
+ const char *export;
+
+#define STRING_OR_NULL(s) ((s) ? (s) : "(null)")
+
+ export_buf = vstring_alloc(100);
+ for (tp = test_cases; tp->label != 0; tp++) {
+ test_failed = 0;
+ for (err = 0, ap = tp->associations; err == 0 && ap->lhs != 0; ap++)
+ err = add_known_tcp_port(ap->lhs, ap->rhs);
+ if (!err != !tp->exp_err) {
+ msg_warn("test case %s: got error: \"%s\", want: \"%s\"",
+ tp->label, STRING_OR_NULL(err), STRING_OR_NULL(tp->exp_err));
+ test_failed = 1;
+ } else if (err != 0) {
+ if (strcmp(err, tp->exp_err) != 0) {
+ msg_warn("test case %s: got err: \"%s\", want: \"%s\"",
+ tp->label, err, tp->exp_err);
+ test_failed = 1;
+ }
+ } else {
+ export = export_known_tcp_ports(export_buf);
+ if (strcmp(export, tp->exp_export) != 0) {
+ msg_warn("test case %s: got export: \"%s\", want: \"%s\"",
+ tp->label, export, tp->exp_export);
+ test_failed = 1;
+ }
+ for (pp = tp->probes; test_failed == 0 && pp->query != 0; pp++) {
+ reply = filter_known_tcp_port(pp->query);
+ if (strcmp(reply, pp->exp_reply) != 0) {
+ msg_warn("test case %s: got reply: \"%s\", want: \"%s\"",
+ tp->label, reply, pp->exp_reply);
+ test_failed = 1;
+ }
+ }
+ }
+ clear_known_tcp_ports();
+ if (test_failed) {
+ msg_info("%s: FAIL", tp->label);
+ fail++;
+ } else {
+ msg_info("%s: PASS", tp->label);
+ pass++;
+ }
+ }
+ msg_info("PASS=%d FAIL=%d", pass, fail);
+ vstring_free(export_buf);
+ exit(fail != 0);
+}
+
+#endif
--- /dev/null
+#ifndef _KNOWN_TCP_PORTS_H_INCLUDED_
+#define _KNOWN_TCP_PORTS_H_INCLUDED_
+
+/*++
+/* NAME
+/* known_tcp_port 3h
+/* SUMMARY
+/* reduce dependency on the services(5) database
+/* SYNOPSIS
+/* #include <known_tcp_ports.h>
+/* DESCRIPTION
+/* .nf
+
+ /*
+ * Utility library.
+ */
+#include <vstring.h>
+
+ /*
+ * External interface.
+ */
+extern const char *add_known_tcp_port(const char *name, const char *port);
+extern const char *filter_known_tcp_port(const char *name_or_port);
+extern void clear_known_tcp_ports(void);
+extern char *export_known_tcp_ports(VSTRING *out);
+
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+#endif
--- /dev/null
+unknown: good: PASS
+unknown: duplicate lhs: PASS
+unknown: numerical lhs: PASS
+unknown: symbolic rhs: PASS
+unknown: uninitialized: PASS
+unknown: PASS=5 FAIL=0
#include <inet_proto.h>
#include <myaddrinfo.h>
#include <split_at.h>
+#include <known_tcp_ports.h>
/* Application-specific. */
} else {
return (-1);
}
- if ((sp = getservbyname(service, proto)) != 0) {
+ if ((sp = getservbyname(filter_known_tcp_port(service), proto)) != 0) {
return (sp->s_port);
} else {
return (-1);
}
#endif
}
- err = getaddrinfo(hostname, service, &hints, res);
+ err = getaddrinfo(hostname, filter_known_tcp_port(service), &hints, res);
#if defined(BROKEN_AI_NULL_SERVICE)
if (service == 0 && err == 0) {
struct addrinfo *r;
}
#endif
}
- err = getaddrinfo(hostaddr, service, &hints, res);
+ err = getaddrinfo(hostaddr, filter_known_tcp_port(service), &hints, res);
#if defined(BROKEN_AI_NULL_SERVICE)
if (service == 0 && err == 0) {
struct addrinfo *r;
projects / thirdparty / postfix.git / commitdiff
