20091023
- Feature: specify "smtp_command_maps = pcre:/file/name" to
- replace incoming SMTP commands before they are executed by
- the Postfix SMTP server. This a last-resort tool to fix bad
- command syntax that Postfix would otherwise reject. See
- examples in the postconf(5) manual page. File: smtpd/smtpd.c.
+ Feature: specify "smtp_command_filter = pcre:/file/name"
+ to replace remote SMTP client commands before they are
+ executed by the Postfix SMTP server. This a last-resort
+ tool to fix inter-operability problems. See examples in
+ the postconf(5) manual page. File: smtpd/smtpd.c.
20091026
SMTP servers that reply to the malicious commands after
negotiating the Postfix SMTP client TLS session. File:
smtp/smtp_proto.c.
+
+20091113
+
+ Workaround: skip interfaces without netmask, to avoid
+ segfaults (reported by Dmitry Karasik). Don't supply a dummy
+ null netmask, as that would turn Postfix into an open relay
+ (mynetworks = 0.0.0.0/0). File: util/inet_addr_local.c.
+
+ Bugfix: forgot to flush output to the smtpd_proxy speed-adjust
+ buffer before truncating the file. Reported by Mark Martinec,
+ fix by Victor Duchovni. File: smtpd/smtpd_proxy.c.
+
+20091114
+
+ Feature: specify "smtp_reply_filter = pcre:/file/name" to
+ replace remote SMTP server reply lines before they are
+ parsed by the Postfix SMTP client. This a last-resort tool
+ to fix inter-operability problems. See examples in the
+ postconf(5) manual page. File: smtp/smtp_chat.c.
+
+ Safety: don't send postmaster notifications to report
+ problems delivering (possible) postmaster notifications.
+ File: smtp/smtp_connect.c.
Remove this file from the stable release.
+ Move smtpd_command_filter into smtpd_chat_query() and update
+ the session transcript (see smtp_chat_reply() for an example).
+
Add smtpd_sender_login_maps to proxy_read_maps.
SMTP connection caching without storing connections, to
Quote addresses in SMTP MAIL FROM and RCPT TO com-
mands as required by <a href="http://tools.ietf.org/html/rfc2821">RFC 2821</a>.
+ <b><a href="postconf.5.html#smtp_reply_filter">smtp_reply_filter</a> (empty)</b>
+ A mechanism to transform replies from remote SMTP
+ servers one line at a time.
+
<b><a href="postconf.5.html#smtp_skip_5xx_greeting">smtp_skip_5xx_greeting</a> (yes)</b>
Skip SMTP servers that greet with a 5XX status code
(go away, do not try again later).
<b><a href="postconf.5.html#smtp_skip_quit_response">smtp_skip_quit_response</a> (yes)</b>
- Do not wait for the response to the SMTP QUIT com-
+ Do not wait for the response to the SMTP QUIT com-
mand.
Available in Postfix version 2.0 and earlier:
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtp_discard_ehlo_keyword_address_maps">smtp_discard_ehlo_keyword_address_maps</a> (empty)</b>
- Lookup tables, indexed by the remote SMTP server
- address, with case insensitive lists of EHLO key-
- words (pipelining, starttls, auth, etc.) that the
- Postfix SMTP client will ignore in the EHLO
+ Lookup tables, indexed by the remote SMTP server
+ address, with case insensitive lists of EHLO key-
+ words (pipelining, starttls, auth, etc.) that the
+ Postfix SMTP client will ignore in the EHLO
response from a remote SMTP server.
<b><a href="postconf.5.html#smtp_discard_ehlo_keywords">smtp_discard_ehlo_keywords</a> (empty)</b>
- A case insensitive list of EHLO keywords (pipelin-
- ing, starttls, auth, etc.) that the Postfix SMTP
- client will ignore in the EHLO response from a
+ A case insensitive list of EHLO keywords (pipelin-
+ ing, starttls, auth, etc.) that the Postfix SMTP
+ client will ignore in the EHLO response from a
remote SMTP server.
<b><a href="postconf.5.html#smtp_generic_maps">smtp_generic_maps</a> (empty)</b>
Optional lookup tables that perform address rewrit-
- ing in the SMTP client, typically to transform a
+ ing in the SMTP client, typically to transform a
locally valid address into a globally valid address
when sending mail across the Internet.
Available in Postfix version 2.2.9 and later:
<b><a href="postconf.5.html#smtp_cname_overrides_servername">smtp_cname_overrides_servername</a> (version dependent)</b>
- Allow DNS CNAME records to override the servername
+ Allow DNS CNAME records to override the servername
that the Postfix SMTP client uses for logging, SASL
- password lookup, TLS policy decisions, or TLS cer-
+ password lookup, TLS policy decisions, or TLS cer-
tificate verification.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#lmtp_discard_lhlo_keyword_address_maps">lmtp_discard_lhlo_keyword_address_maps</a> (empty)</b>
- Lookup tables, indexed by the remote LMTP server
- address, with case insensitive lists of LHLO key-
- words (pipelining, starttls, auth, etc.) that the
+ Lookup tables, indexed by the remote LMTP server
+ address, with case insensitive lists of LHLO key-
+ words (pipelining, starttls, auth, etc.) that the
LMTP client will ignore in the LHLO response from a
remote LMTP server.
<b><a href="postconf.5.html#lmtp_discard_lhlo_keywords">lmtp_discard_lhlo_keywords</a> (empty)</b>
- A case insensitive list of LHLO keywords (pipelin-
- ing, starttls, auth, etc.) that the LMTP client
+ A case insensitive list of LHLO keywords (pipelin-
+ ing, starttls, auth, etc.) that the LMTP client
will ignore in the LHLO response from a remote LMTP
server.
<b><a href="postconf.5.html#send_cyrus_sasl_authzid">send_cyrus_sasl_authzid</a> (no)</b>
When authenticating to a remote SMTP or LMTP server
- with the default setting "no", send no SASL autho-
+ with the default setting "no", send no SASL autho-
riZation ID (authzid); send only the SASL authenti-
Cation ID (authcid) plus the authcid's password.
Available in Postfix version 2.5 and later:
<b><a href="postconf.5.html#smtp_header_checks">smtp_header_checks</a> (empty)</b>
- Restricted <a href="header_checks.5.html"><b>header_checks</b>(5)</a> tables for the Postfix
+ Restricted <a href="header_checks.5.html"><b>header_checks</b>(5)</a> tables for the Postfix
SMTP client.
<b><a href="postconf.5.html#smtp_mime_header_checks">smtp_mime_header_checks</a> (empty)</b>
Postfix SMTP client.
<b><a href="postconf.5.html#smtp_nested_header_checks">smtp_nested_header_checks</a> (empty)</b>
- Restricted <b><a href="postconf.5.html#nested_header_checks">nested_header_checks</a></b>(5) tables for the
+ Restricted <b><a href="postconf.5.html#nested_header_checks">nested_header_checks</a></b>(5) tables for the
Postfix SMTP client.
<b><a href="postconf.5.html#smtp_body_checks">smtp_body_checks</a> (empty)</b>
- Restricted <a href="header_checks.5.html"><b>body_checks</b>(5)</a> tables for the Postfix
+ Restricted <a href="header_checks.5.html"><b>body_checks</b>(5)</a> tables for the Postfix
SMTP client.
Available in Postfix version 2.6 and later:
<b><a href="postconf.5.html#tcp_windowsize">tcp_windowsize</a> (0)</b>
- An optional workaround for routers that break TCP
+ An optional workaround for routers that break TCP
window scaling.
<b>MIME PROCESSING CONTROLS</b>
Available in Postfix version 2.0 and later:
<b><a href="postconf.5.html#disable_mime_output_conversion">disable_mime_output_conversion</a> (no)</b>
- Disable the conversion of 8BITMIME format to 7BIT
+ Disable the conversion of 8BITMIME format to 7BIT
format.
<b><a href="postconf.5.html#mime_boundary_length_limit">mime_boundary_length_limit</a> (2048)</b>
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 server EHLO response announces XFOR-
+ Send the non-standard XFORWARD command when the
+ Postfix SMTP server EHLO response announces XFOR-
WARD support.
<b>SASL AUTHENTICATION CONTROLS</b>
<b><a href="postconf.5.html#smtp_sasl_auth_enable">smtp_sasl_auth_enable</a> (no)</b>
- Enable SASL authentication in the Postfix SMTP
+ 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 SMTP client lookup tables with one user-
- name:password entry per remote hostname or domain,
+ Optional SMTP client lookup tables with one user-
+ name:password entry per remote hostname or domain,
or sender address when sender-dependent authentica-
tion is enabled.
<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 implementation that is selected
+ Postfix SMTP client SASL security options; as of
+ Postfix 2.3 the list of available features depends
+ on the SASL client implementation 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 server's list of offered SASL mecha-
+ If non-empty, a Postfix SMTP client filter for the
+ remote SMTP server's list of offered SASL mecha-
nisms.
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 Post-
- fix SMTP client; this is available only with SASL
- authentication, and disables SMTP connection
- caching to ensure that mail from different senders
+ fix SMTP client; this is available only with SASL
+ authentication, and disables SMTP connection
+ caching to ensure that mail from different 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 Post-
- fix SMTP client passes through to the SASL plug-in
- implementation that is selected with
+ Implementation-specific information that the Post-
+ fix SMTP client 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
+ 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 authen-
- tication failures with the same remote SMTP server
+ An optional table to prevent repeated SASL authen-
+ tication failures 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>
+ 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 authenti-
- cation request with a 535 reply code, defer mail
- delivery instead of returning mail as undeliver-
+ When a remote SMTP server rejects a SASL authenti-
+ cation request with a 535 reply code, defer mail
+ delivery instead of returning mail as undeliver-
able.
<b>STARTTLS SUPPORT CONTROLS</b>
- Detailed information about STARTTLS configuration may be
+ 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>
The default SMTP TLS security level for the Postfix
- SMTP client; when a non-empty value is specified,
- this overrides the obsolete parameters
+ SMTP client; when a non-empty value is specified,
+ this overrides the obsolete parameters
<a href="postconf.5.html#smtp_use_tls">smtp_use_tls</a>, <a href="postconf.5.html#smtp_enforce_tls">smtp_enforce_tls</a>, and
<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_secu</a>-</b>
<b><a href="postconf.5.html#smtp_sasl_security_options">rity_options</a>)</b>
- The SASL authentication security options that the
- Postfix SMTP client uses for TLS encrypted 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 during TLS startup and shutdown hand-
+ Time limit for Postfix SMTP client write and read
+ operations during TLS startup and shutdown hand-
shake 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 certifi-
+ A file containing CA certificates of root CAs
+ trusted to sign either remote SMTP server certifi-
cates or intermediate CA certificates.
<b><a href="postconf.5.html#smtp_tls_CApath">smtp_tls_CApath</a> (empty)</b>
- Directory with PEM format certificate authority
- certificates that the Postfix SMTP client uses to
+ Directory with PEM format certificate authority
+ certificates that the Postfix SMTP client uses to
verify a remote SMTP server certificate.
<b><a href="postconf.5.html#smtp_tls_cert_file">smtp_tls_cert_file</a> (empty)</b>
- File with the Postfix SMTP client RSA 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
+ 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>
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 SMTP client cipher list at manda-
+ Additional list of ciphers or cipher types to
+ exclude from the SMTP client cipher list at manda-
tory TLS security levels.
<b><a href="postconf.5.html#smtp_tls_dcert_file">smtp_tls_dcert_file</a> (empty)</b>
- File with the Postfix SMTP client DSA certificate
+ File with the Postfix SMTP client DSA certificate
in PEM format.
<b><a href="postconf.5.html#smtp_tls_dkey_file">smtp_tls_dkey_file</a> ($<a href="postconf.5.html#smtp_tls_dcert_file">smtp_tls_dcert_file</a>)</b>
- File with the Postfix SMTP client DSA private key
+ File with the Postfix SMTP client DSA private key
in PEM format.
<b><a href="postconf.5.html#smtp_tls_key_file">smtp_tls_key_file</a> ($<a href="postconf.5.html#smtp_tls_cert_file">smtp_tls_cert_file</a>)</b>
- File with the Postfix SMTP client RSA private key
+ File with the Postfix SMTP client RSA private key
in PEM format.
<b><a href="postconf.5.html#smtp_tls_loglevel">smtp_tls_loglevel</a> (0)</b>
- Enable additional Postfix SMTP client logging of
+ 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, when TLS is not already enabled
+ 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>
Optional lookup tables with the Postfix SMTP client
TLS security policy by next-hop destination; when a
- non-empty value is specified, this overrides the
+ non-empty value is specified, 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> (SSLv3, TLSv1)</b>
- List of SSL/TLS protocols that the Postfix SMTP
+ List of SSL/TLS protocols that the Postfix SMTP
client will use with mandatory 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 cer-
+ The verification depth for remote SMTP server cer-
tificates.
<b><a href="postconf.5.html#smtp_tls_secure_cert_match">smtp_tls_secure_cert_match</a> (nexthop, dot-nexthop)</b>
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>
- Name of the file containing the optional Postfix
+ Name of the file containing the optional Postfix
SMTP client TLS session cache.
<b><a href="postconf.5.html#smtp_tls_session_cache_timeout">smtp_tls_session_cache_timeout</a> (3600s)</b>
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 internal pseudo random
+ 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></b>
ciphers.
<b><a href="postconf.5.html#tls_low_cipherlist">tls_low_cipherlist</a> (ALL:!EXPORT:+RC4:@STRENGTH)</b>
- The OpenSSL cipherlist for "LOW" or higher grade
+ The OpenSSL cipherlist for "LOW" or higher grade
ciphers.
<b><a href="postconf.5.html#tls_export_cipherlist">tls_export_cipherlist</a> (ALL:+RC4:@STRENGTH)</b>
ciphers.
<b><a href="postconf.5.html#tls_null_cipherlist">tls_null_cipherlist</a> (eNULL:!aNULL)</b>
- The OpenSSL cipherlist for "NULL" grade ciphers
+ 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></b>
<b>($<a href="postconf.5.html#smtp_sasl_tls_security_options">smtp_sasl_tls_security_options</a>)</b>
- The SASL authentication security options that the
- Postfix SMTP client uses for TLS encrypted SMTP
+ 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
+ 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_security_level</a></b> = fingerprint).
<b><a href="postconf.5.html#smtp_tls_fingerprint_digest">smtp_tls_fingerprint_digest</a> (md5)</b>
- The message digest algorithm used to construct
+ 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> (!SSLv2)</b>
- List of TLS protocols that the Postfix SMTP client
- will exclude or include with opportunistic TLS
+ List of TLS protocols that the Postfix SMTP client
+ will exclude or include with opportunistic TLS
encryption.
<b><a href="postconf.5.html#smtp_tls_ciphers">smtp_tls_ciphers</a> (export)</b>
- The minimum TLS cipher grade that the Postfix SMTP
- client will use with opportunistic TLS encryption.
+ 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
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 malicious HELO/MAIL/RCPT/DATA
- commands to a Postfix client TLS session.
+ Try to detect a mail hijacking attack based on a
+ TLS protocol vulnerability (CVE-2009-3555), where
+ an attacker prepends malicious HELO, MAIL, RCPT,
+ DATA commands to a Postfix SMTP client TLS session.
<b>OBSOLETE STARTTLS CONTROLS</b>
The following configuration parameters exist for compati-
</p>
+</DD>
+
+<DT><b><a name="lmtp_reply_filter">lmtp_reply_filter</a>
+(default: empty)</b></DT><DD>
+
+<p> The LMTP-specific version of the <a href="postconf.5.html#smtp_reply_filter">smtp_reply_filter</a>
+configuration parameter. See there for details. </p>
+
+<p> This feature is available in Postfix 2.7 and later. </p>
+
+
</DD>
<DT><b><a name="lmtp_rset_timeout">lmtp_rset_timeout</a>
<p> This feature is available in Postfix 2.3 and later. </p>
+</DD>
+
+<DT><b><a name="lmtp_tls_block_early_mail_reply">lmtp_tls_block_early_mail_reply</a>
+(default: empty)</b></DT><DD>
+
+<p> The LMTP-specific version of the <a href="postconf.5.html#smtp_tls_block_early_mail_reply">smtp_tls_block_early_mail_reply</a>
+configuration parameter. See there for details. </p>
+
+<p> This feature is available in Postfix 2.7 and later. </p>
+
+
</DD>
<DT><b><a name="lmtp_tls_cert_file">lmtp_tls_cert_file</a>
</p>
+</DD>
+
+<DT><b><a name="smtp_reply_filter">smtp_reply_filter</a>
+(default: empty)</b></DT><DD>
+
+<p> A mechanism to transform replies from remote SMTP servers one
+line at a time. This is a last-resort tool to work around server
+replies that break inter-operability with the Postfix SMTP client.
+Other uses involve fault injection to test Postfix's handling of
+invalid responses. </p>
+
+<p> Notes: </p>
+
+<ul>
+
+<li> <p> In the case of a multi-line reply, the Postfix SMTP client
+uses the last reply line's numerical SMTP reply code and enhanced
+status code. </p>
+
+<li> <p> The numerical SMTP reply code (XYZ) takes precedence over
+the enhanced status code (X.Y.Z). When the enhanced status code
+initial digit differs from the SMTP reply code initial digit, or
+when no enhanced status code is present, the Postfix SMTP client
+uses a generic enhanced status code (X.0.0) instead. </p>
+
+</ul>
+
+<p> Specify the name of a "<a href="DATABASE_README.html">type:table</a>" lookup table. The search
+string is a single SMTP reply line as received from the remote SMTP
+server, except that the trailing <CR><LF> are removed. </p>
+
+<p> Examples: </p>
+
+<pre>
+/etc/postfix/<a href="postconf.5.html">main.cf</a>:
+ <a href="postconf.5.html#smtp_reply_filter">smtp_reply_filter</a> = <a href="pcre_table.5.html">pcre</a>:/etc/postfix/command_filter
+</pre>
+
+<pre>
+/etc/postfix/reply_filter:
+ # Transform garbage into part of a multi-line reply. Note
+ # that the Postfix SMTP client uses only the last numerical
+ # SMTP reply code and enhanced status code from a multi-line
+ # reply, so it does not matter what we substitute here as
+ # long as it has the right syntax.
+ !/^([2-5][0-9][0-9]($|[- ]))/ 250-filler for garbage
+</pre>
+
+<p> This feature is available in Postfix 2.7. </p>
+
+
</DD>
<DT><b><a name="smtp_rset_timeout">smtp_rset_timeout</a>
<p> Try to detect a mail hijacking attack based on a TLS protocol
vulnerability (CVE-2009-3555), where an attacker prepends malicious
-HELO/MAIL/RCPT/DATA commands to a Postfix client TLS session. The
-attack would succeed with non-Postfix SMTP servers that reply to
-the malicious HELO/MAIL/RCPT/DATA commands after negotiating the
-Postfix SMTP client TLS session. </p>
+HELO, MAIL, RCPT, DATA commands to a Postfix SMTP client TLS session.
+The attack would succeed with non-Postfix SMTP servers that reply
+to the malicious HELO, MAIL, RCPT, DATA commands after negotiating
+the Postfix SMTP client TLS session. </p>
<p> This feature is available in Postfix 2.7. </p>
<DT><b><a name="smtpd_command_filter">smtpd_command_filter</a>
(default: empty)</b></DT><DD>
-<p> A mechanism to substitute incoming SMTP commands. This is a
-last-resort tool to work around problems with clients that send
-invalid command syntax that would otherwise be rejected by Postfix.
+<p> A mechanism to transform commands from remote SMTP clients.
+This is a last-resort tool to work around client commands that break
+inter-operability with the Postfix SMTP server. Other uses involve
+fault injection to test Postfix's handling of invalid commands.
</p>
<p> Specify the name of a "<a href="DATABASE_README.html">type:table</a>" lookup table. The search
-string is the SMTP command as received from the SMTP client, except
-that initial whitespace and the trailing <CR><LF> are removed. The
-result value is executed by the Postfix SMTP server. </p>
+string is the SMTP command as received from the remote SMTP client,
+except that initial whitespace and the trailing <CR><LF>
+are removed. The result value is executed by the Postfix SMTP
+server. </p>
<p> Examples: </p>
</pre>
<pre>
- # Work around clients that send RCPT TO:<'user@domain'>.
+ # Work around clients that send RCPT TO:<'user@domain'>.
# WARNING: do not lose the parameters that follow the address.
- /^RCPT\s+TO:\s*<'([^[:space:]]+)'>(.*)/ RCPT TO:<$1>$2
+ /^RCPT\s+TO:\s*<'([^[:space:]]+)'>(.*)/ RCPT TO:<$1>$2
</pre>
<p> This feature is available in Postfix 2.7. </p>
Quote addresses in SMTP MAIL FROM and RCPT TO com-
mands as required by <a href="http://tools.ietf.org/html/rfc2821">RFC 2821</a>.
+ <b><a href="postconf.5.html#smtp_reply_filter">smtp_reply_filter</a> (empty)</b>
+ A mechanism to transform replies from remote SMTP
+ servers one line at a time.
+
<b><a href="postconf.5.html#smtp_skip_5xx_greeting">smtp_skip_5xx_greeting</a> (yes)</b>
Skip SMTP servers that greet with a 5XX status code
(go away, do not try again later).
<b><a href="postconf.5.html#smtp_skip_quit_response">smtp_skip_quit_response</a> (yes)</b>
- Do not wait for the response to the SMTP QUIT com-
+ Do not wait for the response to the SMTP QUIT com-
mand.
Available in Postfix version 2.0 and earlier:
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtp_discard_ehlo_keyword_address_maps">smtp_discard_ehlo_keyword_address_maps</a> (empty)</b>
- Lookup tables, indexed by the remote SMTP server
- address, with case insensitive lists of EHLO key-
- words (pipelining, starttls, auth, etc.) that the
- Postfix SMTP client will ignore in the EHLO
+ Lookup tables, indexed by the remote SMTP server
+ address, with case insensitive lists of EHLO key-
+ words (pipelining, starttls, auth, etc.) that the
+ Postfix SMTP client will ignore in the EHLO
response from a remote SMTP server.
<b><a href="postconf.5.html#smtp_discard_ehlo_keywords">smtp_discard_ehlo_keywords</a> (empty)</b>
- A case insensitive list of EHLO keywords (pipelin-
- ing, starttls, auth, etc.) that the Postfix SMTP
- client will ignore in the EHLO response from a
+ A case insensitive list of EHLO keywords (pipelin-
+ ing, starttls, auth, etc.) that the Postfix SMTP
+ client will ignore in the EHLO response from a
remote SMTP server.
<b><a href="postconf.5.html#smtp_generic_maps">smtp_generic_maps</a> (empty)</b>
Optional lookup tables that perform address rewrit-
- ing in the SMTP client, typically to transform a
+ ing in the SMTP client, typically to transform a
locally valid address into a globally valid address
when sending mail across the Internet.
Available in Postfix version 2.2.9 and later:
<b><a href="postconf.5.html#smtp_cname_overrides_servername">smtp_cname_overrides_servername</a> (version dependent)</b>
- Allow DNS CNAME records to override the servername
+ Allow DNS CNAME records to override the servername
that the Postfix SMTP client uses for logging, SASL
- password lookup, TLS policy decisions, or TLS cer-
+ password lookup, TLS policy decisions, or TLS cer-
tificate verification.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#lmtp_discard_lhlo_keyword_address_maps">lmtp_discard_lhlo_keyword_address_maps</a> (empty)</b>
- Lookup tables, indexed by the remote LMTP server
- address, with case insensitive lists of LHLO key-
- words (pipelining, starttls, auth, etc.) that the
+ Lookup tables, indexed by the remote LMTP server
+ address, with case insensitive lists of LHLO key-
+ words (pipelining, starttls, auth, etc.) that the
LMTP client will ignore in the LHLO response from a
remote LMTP server.
<b><a href="postconf.5.html#lmtp_discard_lhlo_keywords">lmtp_discard_lhlo_keywords</a> (empty)</b>
- A case insensitive list of LHLO keywords (pipelin-
- ing, starttls, auth, etc.) that the LMTP client
+ A case insensitive list of LHLO keywords (pipelin-
+ ing, starttls, auth, etc.) that the LMTP client
will ignore in the LHLO response from a remote LMTP
server.
<b><a href="postconf.5.html#send_cyrus_sasl_authzid">send_cyrus_sasl_authzid</a> (no)</b>
When authenticating to a remote SMTP or LMTP server
- with the default setting "no", send no SASL autho-
+ with the default setting "no", send no SASL autho-
riZation ID (authzid); send only the SASL authenti-
Cation ID (authcid) plus the authcid's password.
Available in Postfix version 2.5 and later:
<b><a href="postconf.5.html#smtp_header_checks">smtp_header_checks</a> (empty)</b>
- Restricted <a href="header_checks.5.html"><b>header_checks</b>(5)</a> tables for the Postfix
+ Restricted <a href="header_checks.5.html"><b>header_checks</b>(5)</a> tables for the Postfix
SMTP client.
<b><a href="postconf.5.html#smtp_mime_header_checks">smtp_mime_header_checks</a> (empty)</b>
Postfix SMTP client.
<b><a href="postconf.5.html#smtp_nested_header_checks">smtp_nested_header_checks</a> (empty)</b>
- Restricted <b><a href="postconf.5.html#nested_header_checks">nested_header_checks</a></b>(5) tables for the
+ Restricted <b><a href="postconf.5.html#nested_header_checks">nested_header_checks</a></b>(5) tables for the
Postfix SMTP client.
<b><a href="postconf.5.html#smtp_body_checks">smtp_body_checks</a> (empty)</b>
- Restricted <a href="header_checks.5.html"><b>body_checks</b>(5)</a> tables for the Postfix
+ Restricted <a href="header_checks.5.html"><b>body_checks</b>(5)</a> tables for the Postfix
SMTP client.
Available in Postfix version 2.6 and later:
<b><a href="postconf.5.html#tcp_windowsize">tcp_windowsize</a> (0)</b>
- An optional workaround for routers that break TCP
+ An optional workaround for routers that break TCP
window scaling.
<b>MIME PROCESSING CONTROLS</b>
Available in Postfix version 2.0 and later:
<b><a href="postconf.5.html#disable_mime_output_conversion">disable_mime_output_conversion</a> (no)</b>
- Disable the conversion of 8BITMIME format to 7BIT
+ Disable the conversion of 8BITMIME format to 7BIT
format.
<b><a href="postconf.5.html#mime_boundary_length_limit">mime_boundary_length_limit</a> (2048)</b>
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 server EHLO response announces XFOR-
+ Send the non-standard XFORWARD command when the
+ Postfix SMTP server EHLO response announces XFOR-
WARD support.
<b>SASL AUTHENTICATION CONTROLS</b>
<b><a href="postconf.5.html#smtp_sasl_auth_enable">smtp_sasl_auth_enable</a> (no)</b>
- Enable SASL authentication in the Postfix SMTP
+ 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 SMTP client lookup tables with one user-
- name:password entry per remote hostname or domain,
+ Optional SMTP client lookup tables with one user-
+ name:password entry per remote hostname or domain,
or sender address when sender-dependent authentica-
tion is enabled.
<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 implementation that is selected
+ Postfix SMTP client SASL security options; as of
+ Postfix 2.3 the list of available features depends
+ on the SASL client implementation 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 server's list of offered SASL mecha-
+ If non-empty, a Postfix SMTP client filter for the
+ remote SMTP server's list of offered SASL mecha-
nisms.
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 Post-
- fix SMTP client; this is available only with SASL
- authentication, and disables SMTP connection
- caching to ensure that mail from different senders
+ fix SMTP client; this is available only with SASL
+ authentication, and disables SMTP connection
+ caching to ensure that mail from different 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 Post-
- fix SMTP client passes through to the SASL plug-in
- implementation that is selected with
+ Implementation-specific information that the Post-
+ fix SMTP client 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
+ 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 authen-
- tication failures with the same remote SMTP server
+ An optional table to prevent repeated SASL authen-
+ tication failures 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>
+ 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 authenti-
- cation request with a 535 reply code, defer mail
- delivery instead of returning mail as undeliver-
+ When a remote SMTP server rejects a SASL authenti-
+ cation request with a 535 reply code, defer mail
+ delivery instead of returning mail as undeliver-
able.
<b>STARTTLS SUPPORT CONTROLS</b>
- Detailed information about STARTTLS configuration may be
+ 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>
The default SMTP TLS security level for the Postfix
- SMTP client; when a non-empty value is specified,
- this overrides the obsolete parameters
+ SMTP client; when a non-empty value is specified,
+ this overrides the obsolete parameters
<a href="postconf.5.html#smtp_use_tls">smtp_use_tls</a>, <a href="postconf.5.html#smtp_enforce_tls">smtp_enforce_tls</a>, and
<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_secu</a>-</b>
<b><a href="postconf.5.html#smtp_sasl_security_options">rity_options</a>)</b>
- The SASL authentication security options that the
- Postfix SMTP client uses for TLS encrypted 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 during TLS startup and shutdown hand-
+ Time limit for Postfix SMTP client write and read
+ operations during TLS startup and shutdown hand-
shake 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 certifi-
+ A file containing CA certificates of root CAs
+ trusted to sign either remote SMTP server certifi-
cates or intermediate CA certificates.
<b><a href="postconf.5.html#smtp_tls_CApath">smtp_tls_CApath</a> (empty)</b>
- Directory with PEM format certificate authority
- certificates that the Postfix SMTP client uses to
+ Directory with PEM format certificate authority
+ certificates that the Postfix SMTP client uses to
verify a remote SMTP server certificate.
<b><a href="postconf.5.html#smtp_tls_cert_file">smtp_tls_cert_file</a> (empty)</b>
- File with the Postfix SMTP client RSA 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
+ 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>
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 SMTP client cipher list at manda-
+ Additional list of ciphers or cipher types to
+ exclude from the SMTP client cipher list at manda-
tory TLS security levels.
<b><a href="postconf.5.html#smtp_tls_dcert_file">smtp_tls_dcert_file</a> (empty)</b>
- File with the Postfix SMTP client DSA certificate
+ File with the Postfix SMTP client DSA certificate
in PEM format.
<b><a href="postconf.5.html#smtp_tls_dkey_file">smtp_tls_dkey_file</a> ($<a href="postconf.5.html#smtp_tls_dcert_file">smtp_tls_dcert_file</a>)</b>
- File with the Postfix SMTP client DSA private key
+ File with the Postfix SMTP client DSA private key
in PEM format.
<b><a href="postconf.5.html#smtp_tls_key_file">smtp_tls_key_file</a> ($<a href="postconf.5.html#smtp_tls_cert_file">smtp_tls_cert_file</a>)</b>
- File with the Postfix SMTP client RSA private key
+ File with the Postfix SMTP client RSA private key
in PEM format.
<b><a href="postconf.5.html#smtp_tls_loglevel">smtp_tls_loglevel</a> (0)</b>
- Enable additional Postfix SMTP client logging of
+ 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, when TLS is not already enabled
+ 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>
Optional lookup tables with the Postfix SMTP client
TLS security policy by next-hop destination; when a
- non-empty value is specified, this overrides the
+ non-empty value is specified, 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> (SSLv3, TLSv1)</b>
- List of SSL/TLS protocols that the Postfix SMTP
+ List of SSL/TLS protocols that the Postfix SMTP
client will use with mandatory 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 cer-
+ The verification depth for remote SMTP server cer-
tificates.
<b><a href="postconf.5.html#smtp_tls_secure_cert_match">smtp_tls_secure_cert_match</a> (nexthop, dot-nexthop)</b>
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>
- Name of the file containing the optional Postfix
+ Name of the file containing the optional Postfix
SMTP client TLS session cache.
<b><a href="postconf.5.html#smtp_tls_session_cache_timeout">smtp_tls_session_cache_timeout</a> (3600s)</b>
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 internal pseudo random
+ 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></b>
ciphers.
<b><a href="postconf.5.html#tls_low_cipherlist">tls_low_cipherlist</a> (ALL:!EXPORT:+RC4:@STRENGTH)</b>
- The OpenSSL cipherlist for "LOW" or higher grade
+ The OpenSSL cipherlist for "LOW" or higher grade
ciphers.
<b><a href="postconf.5.html#tls_export_cipherlist">tls_export_cipherlist</a> (ALL:+RC4:@STRENGTH)</b>
ciphers.
<b><a href="postconf.5.html#tls_null_cipherlist">tls_null_cipherlist</a> (eNULL:!aNULL)</b>
- The OpenSSL cipherlist for "NULL" grade ciphers
+ 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></b>
<b>($<a href="postconf.5.html#smtp_sasl_tls_security_options">smtp_sasl_tls_security_options</a>)</b>
- The SASL authentication security options that the
- Postfix SMTP client uses for TLS encrypted SMTP
+ 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
+ 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_security_level</a></b> = fingerprint).
<b><a href="postconf.5.html#smtp_tls_fingerprint_digest">smtp_tls_fingerprint_digest</a> (md5)</b>
- The message digest algorithm used to construct
+ 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> (!SSLv2)</b>
- List of TLS protocols that the Postfix SMTP client
- will exclude or include with opportunistic TLS
+ List of TLS protocols that the Postfix SMTP client
+ will exclude or include with opportunistic TLS
encryption.
<b><a href="postconf.5.html#smtp_tls_ciphers">smtp_tls_ciphers</a> (export)</b>
- The minimum TLS cipher grade that the Postfix SMTP
- client will use with opportunistic TLS encryption.
+ 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
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 malicious HELO/MAIL/RCPT/DATA
- commands to a Postfix client TLS session.
+ Try to detect a mail hijacking attack based on a
+ TLS protocol vulnerability (CVE-2009-3555), where
+ an attacker prepends malicious HELO, MAIL, RCPT,
+ DATA commands to a Postfix SMTP client TLS session.
<b>OBSOLETE STARTTLS CONTROLS</b>
The following configuration parameters exist for compati-
rejecting the address as invalid.
<b><a href="postconf.5.html#smtpd_command_filter">smtpd_command_filter</a> (empty)</b>
- A mechanism to substitute incoming SMTP commands.
+ A mechanism to transform commands from remote SMTP
+ clients.
<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> access restriction
+ 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_sasl_exceptions_networks">smtpd_sasl_exceptions_networks</a> (empty)</b>
- What remote SMTP clients the Postfix SMTP server
+ What remote SMTP clients the Postfix SMTP server
will not offer AUTH support to.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtpd_discard_ehlo_keyword_address_maps">smtpd_discard_ehlo_keyword_address_maps</a> (empty)</b>
- Lookup tables, indexed by the remote SMTP client
- address, with case insensitive lists of EHLO key-
- words (pipelining, starttls, auth, etc.) that the
+ Lookup tables, indexed by the remote SMTP client
+ address, with case insensitive lists of EHLO key-
+ words (pipelining, starttls, auth, etc.) that the
SMTP server will not send in the EHLO response to a
remote SMTP client.
<b><a href="postconf.5.html#smtpd_discard_ehlo_keywords">smtpd_discard_ehlo_keywords</a> (empty)</b>
- A case insensitive list of EHLO keywords (pipelin-
- ing, starttls, auth, etc.) that the SMTP server
+ A case insensitive list of EHLO keywords (pipelin-
+ ing, starttls, auth, etc.) that the SMTP server
will not send in the EHLO response to a remote SMTP
client.
<b><a href="postconf.5.html#smtpd_delay_open_until_valid_rcpt">smtpd_delay_open_until_valid_rcpt</a> (yes)</b>
- Postpone the start of an SMTP mail transaction
+ Postpone the start of an SMTP mail transaction
until a valid RCPT TO command is received.
Available in Postfix version 2.3 and later:
<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 ses-
- sion id, even when TLS session caching is turned
+ Force the Postfix SMTP server to issue a TLS ses-
+ sion id, even when TLS session caching is turned
off (<a href="postconf.5.html#smtpd_tls_session_cache_database">smtpd_tls_session_cache_database</a> is empty).
Available in Postfix version 2.6 and later:
<b><a href="postconf.5.html#tcp_windowsize">tcp_windowsize</a> (0)</b>
- An optional workaround for routers that break TCP
+ An optional workaround for routers that break TCP
window scaling.
<b>ADDRESS REWRITING CONTROLS</b>
- See the <a href="ADDRESS_REWRITING_README.html">ADDRESS_REWRITING_README</a> document for a detailed
+ 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>
- Enable or disable recipient validation, built-in
+ Enable or disable recipient validation, built-in
content filtering, or address mapping.
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 update incomplete addresses with the
+ 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 clients at all,
- or rewrite message headers and update incomplete
- addresses with the domain specified in the
+ 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_rewrite_domain</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 further delivery.
+ 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 further 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>
- The name of a mail delivery transport that filters
+ The name of a mail delivery transport that filters
mail after it is queued.
<b>BEFORE QUEUE EXTERNAL CONTENT INSPECTION CONTROLS</b>
- As of version 2.1, the Postfix SMTP server can be config-
- ured to send incoming mail to a real-time SMTP-based con-
+ As of version 2.1, the Postfix SMTP server can be config-
+ ured to send incoming mail to a real-time SMTP-based con-
tent filter BEFORE mail is queued. This content filter is
- expected to inject mail back into Postfix. See the
- <a href="SMTPD_PROXY_README.html">SMTPD_PROXY_README</a> document for details on how to config-
+ expected to inject mail back into Postfix. See the
+ <a href="SMTPD_PROXY_README.html">SMTPD_PROXY_README</a> document for details on how to config-
ure and operate this feature.
<b><a href="postconf.5.html#smtpd_proxy_filter">smtpd_proxy_filter</a> (empty)</b>
- The hostname and TCP port of the mail filtering
+ 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>
proxy filter.
<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 communicates with a before-queue content
+ List of options that control how the Postfix SMTP
+ server communicates with a before-queue content
filter.
<b><a href="postconf.5.html#smtpd_proxy_timeout">smtpd_proxy_timeout</a> (100s)</b>
<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">MILTER_README</a>
+ 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">MILTER_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 arrives via the Postfix <a href="smtpd.8.html"><b>smtpd</b>(8)</a> server.
+ 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 pro-
- tocol extensions for communication with a Milter
- application; prior to Postfix 2.6 the default pro-
+ The mail filter protocol version and optional pro-
+ tocol extensions for communication with a Milter
+ application; prior to Postfix 2.6 the default pro-
tocol 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)
+ The default action when a Milter (mail filter)
application is unavailable or mis-configured.
<b><a href="postconf.5.html#milter_macro_daemon_name">milter_macro_daemon_name</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
cations.
<b><a href="postconf.5.html#milter_connect_timeout">milter_connect_timeout</a> (30s)</b>
- The time limit for connecting to a Milter (mail
- filter) application, and for negotiating protocol
+ The time limit for connecting to a Milter (mail
+ filter) application, 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
+ 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
+ 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 after completion of an SMTP connec-
+ The macros that are sent to Milter (mail filter)
+ applications after completion of an SMTP connec-
tion.
<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)
+ 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)
+ 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)
+ 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 filter) applications after the SMTP
+ 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 filter) applications after an unknown
+ 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)
+ 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)
+ The macros that are sent to Milter (mail filter)
applications after the message end-of-data.
<b>GENERAL CONTENT INSPECTION CONTROLS</b>
- The following parameters are applicable for both built-in
+ The following parameters are applicable for both built-in
and external content filters.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#receive_override_options">receive_override_options</a> (empty)</b>
- Enable or disable recipient validation, built-in
+ Enable or disable recipient validation, built-in
content filtering, or address mapping.
<b>EXTERNAL CONTENT INSPECTION CONTROLS</b>
- The following parameters are applicable for both before-
+ 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 SMTP clients are allowed to use the XFORWARD
+ What SMTP clients are allowed to use the XFORWARD
feature.
<b>SASL AUTHENTICATION CONTROLS</b>
- Postfix SASL support (<a href="http://tools.ietf.org/html/rfc4954">RFC 4954</a>) can be used to authenti-
- cate remote SMTP clients to the Postfix SMTP server, and
- to authenticate the Postfix SMTP client to a remote SMTP
+ Postfix SASL support (<a href="http://tools.ietf.org/html/rfc4954">RFC 4954</a>) can be used to authenti-
+ cate 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 details.
<b><a href="postconf.5.html#broken_sasl_auth_clients">broken_sasl_auth_clients</a> (no)</b>
- Enable inter-operability with SMTP clients that
- implement an obsolete version of the AUTH command
+ Enable inter-operability with 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
+ 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
+ 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 implementation that is selected
+ Postfix SMTP server SASL security options; as of
+ Postfix 2.3 the list of available features depends
+ on the SASL server 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_sender_login_maps">smtpd_sender_login_maps</a> (empty)</b>
- Optional lookup table with the SASL login names
+ Optional lookup table with the SASL login names
that own 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
+ What remote SMTP clients the Postfix SMTP server
will not offer AUTH support to.
Available in Postfix version 2.1 and 2.2:
<b>smtpd_sasl_application_name (smtpd)</b>
- The application name that the Postfix SMTP server
+ 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_authenticated_header">smtpd_sasl_authenticated_header</a> (no)</b>
- Report the SASL authenticated user name in the
+ Report the SASL authenticated user name in the
<a href="smtpd.8.html"><b>smtpd</b>(8)</a> Received message header.
<b><a href="postconf.5.html#smtpd_sasl_path">smtpd_sasl_path</a> (smtpd)</b>
- Implementation-specific information that the Post-
- fix SMTP server passes through to the SASL plug-in
- implementation that is selected with
+ Implementation-specific information that the Post-
+ fix SMTP server 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
+ The SASL plug-in type that the Postfix SMTP server
should use for authentication.
Available in Postfix version 2.5 and later:
<b><a href="postconf.5.html#cyrus_sasl_config_path">cyrus_sasl_config_path</a> (empty)</b>
- Search path for Cyrus SASL application configura-
- tion files, currently used only to locate the
+ Search path for Cyrus SASL application configura-
+ tion files, currently used only to locate the
$<a href="postconf.5.html#smtpd_sasl_path">smtpd_sasl_path</a>.conf file.
<b>STARTTLS SUPPORT CONTROLS</b>
- Detailed information about STARTTLS configuration may be
+ Detailed information about STARTTLS configuration may be
found in the <a href="TLS_README.html">TLS_README</a> document.
<b><a href="postconf.5.html#smtpd_tls_security_level">smtpd_tls_security_level</a> (empty)</b>
- The SMTP TLS security level for the Postfix SMTP
- server; when a non-empty value is specified, this
+ The SMTP TLS security level for the Postfix SMTP
+ server; when a non-empty value is specified, this
overrides the obsolete parameters <a href="postconf.5.html#smtpd_use_tls">smtpd_use_tls</a> and
<a href="postconf.5.html#smtpd_enforce_tls">smtpd_enforce_tls</a>.
<b><a href="postconf.5.html#smtpd_sasl_tls_security_options">smtpd_sasl_tls_security_options</a> ($<a href="postconf.5.html#smtpd_sasl_security_options">smtpd_sasl_secu</a>-</b>
<b><a href="postconf.5.html#smtpd_sasl_security_options">rity_options</a>)</b>
- The SASL authentication security options that the
- Postfix SMTP server uses for TLS encrypted 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> (300s)</b>
- The time limit for Postfix SMTP server write and
- read operations during TLS startup and shutdown
+ The time limit for Postfix SMTP server write and
+ read operations 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 trusted to sign either remote SMTP client
+ A file containing (PEM format) CA certificates of
+ root CAs trusted to sign either remote SMTP client
certificates or intermediate 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 trusted to sign either remote SMTP
- client certificates or intermediate CA certifi-
+ of root CAs trusted to sign either remote SMTP
+ client certificates or intermediate CA certifi-
cates.
<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 ses-
- sion id, even when TLS session caching is turned
+ Force the Postfix SMTP server to issue a TLS ses-
+ sion id, even when TLS session caching is turned
off (<a href="postconf.5.html#smtpd_tls_session_cache_database">smtpd_tls_session_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.
+ 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 not announce or accept SASL authentica-
+ server, do not announce or accept SASL authentica-
tion over unencrypted connections.
<b><a href="postconf.5.html#smtpd_tls_ccert_verifydepth">smtpd_tls_ccert_verifydepth</a> (9)</b>
- The verification depth for remote SMTP client cer-
+ The verification depth for remote SMTP client cer-
tificates.
<b><a href="postconf.5.html#smtpd_tls_cert_file">smtpd_tls_cert_file</a> (empty)</b>
- File with the Postfix SMTP server RSA certificate
+ 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>
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
+ 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
+ File with DH parameters that the Postfix SMTP
server should use with 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
+ File with DH parameters that the Postfix SMTP
server should use with EDH ciphers.
<b><a href="postconf.5.html#smtpd_tls_dkey_file">smtpd_tls_dkey_file</a> ($<a href="postconf.5.html#smtpd_tls_dcert_file">smtpd_tls_dcert_file</a>)</b>
- File with the Postfix SMTP server DSA private key
+ File with the Postfix SMTP server DSA private key
in PEM format.
<b><a href="postconf.5.html#smtpd_tls_key_file">smtpd_tls_key_file</a> ($<a href="postconf.5.html#smtpd_tls_cert_file">smtpd_tls_cert_file</a>)</b>
- File with the Postfix SMTP server RSA private key
+ File with the Postfix SMTP server RSA private key
in PEM format.
<b><a href="postconf.5.html#smtpd_tls_loglevel">smtpd_tls_loglevel</a> (0)</b>
- Enable additional Postfix SMTP server logging of
+ 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
+ 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 SMTP server cipher list at manda-
+ Additional list of ciphers or cipher types to
+ exclude from the SMTP server cipher list at manda-
tory TLS security levels.
<b><a href="postconf.5.html#smtpd_tls_mandatory_protocols">smtpd_tls_mandatory_protocols</a> (SSLv3, TLSv1)</b>
- The SSL/TLS protocols accepted by the Postfix SMTP
+ The SSL/TLS protocols accepted by the Postfix SMTP
server with mandatory TLS encryption.
<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
- client CommonName and client certificate issuer
+ about the protocol and cipher used, as well as the
+ 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 client certificate in order to allow
+ 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_session_cache_database">smtpd_tls_session_cache_database</a> (empty)</b>
- Name of the file containing the optional Postfix
+ Name of the file containing the optional Postfix
SMTP server TLS session cache.
<b><a href="postconf.5.html#smtpd_tls_session_cache_timeout">smtpd_tls_session_cache_timeout</a> (3600s)</b>
sion cache information.
<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, instead of using the STARTTLS com-
+ Run the Postfix SMTP server in the non-standard
+ "wrapper" mode, instead of using the STARTTLS com-
mand.
<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 internal pseudo random
+ 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></b>
ciphers.
<b><a href="postconf.5.html#tls_low_cipherlist">tls_low_cipherlist</a> (ALL:!EXPORT:+RC4:@STRENGTH)</b>
- The OpenSSL cipherlist for "LOW" or higher grade
+ The OpenSSL cipherlist for "LOW" or higher grade
ciphers.
<b><a href="postconf.5.html#tls_export_cipherlist">tls_export_cipherlist</a> (ALL:+RC4:@STRENGTH)</b>
ciphers.
<b><a href="postconf.5.html#tls_null_cipherlist">tls_null_cipherlist</a> (eNULL:!aNULL)</b>
- The OpenSSL cipherlist for "NULL" grade ciphers
+ 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> (md5)</b>
- The message digest algorithm used to construct
+ The message digest algorithm used to construct
client-certificate fingerprints for
<b><a href="postconf.5.html#check_ccert_access">check_ccert_access</a></b> and <b><a href="postconf.5.html#permit_tls_clientcerts">permit_tls_clientcerts</a></b>.
Available in Postfix version 2.6 and later:
<b><a href="postconf.5.html#smtpd_tls_protocols">smtpd_tls_protocols</a> (empty)</b>
- List of TLS protocols that the Postfix SMTP server
- will exclude or include with opportunistic TLS
+ List of TLS protocols that the Postfix SMTP server
+ will exclude or include with opportunistic TLS
encryption.
<b><a href="postconf.5.html#smtpd_tls_ciphers">smtpd_tls_ciphers</a> (export)</b>
- The minimum TLS cipher grade that the Postfix SMTP
- server will use with opportunistic TLS encryption.
+ 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 format.
<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
+ The Postfix SMTP server security grade for
ephemeral elliptic-curve Diffie-Hellman (EECDH) key
exchange.
imally strong ephemeral ECDH key exchange.
<b>OBSOLETE STARTTLS CONTROLS</b>
- The following configuration parameters exist for compati-
+ The following configuration parameters exist for compati-
bility 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
- SMTP clients, but do not require that clients use
+ Opportunistic TLS: announce STARTTLS support to
+ 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>
- Mandatory TLS: announce STARTTLS support to SMTP
- clients, and require that clients use TLS encryp-
+ Mandatory TLS: announce STARTTLS support to SMTP
+ clients, and require that clients use TLS encryp-
tion.
<b><a href="postconf.5.html#smtpd_tls_cipherlist">smtpd_tls_cipherlist</a> (empty)</b>
server TLS cipher list.
<b>VERP SUPPORT CONTROLS</b>
- With VERP style delivery, each recipient of a message
+ With VERP style delivery, each recipient of a message
receives a customized copy of the message with his/her own
- recipient address encoded in the envelope sender address.
+ recipient address encoded in the envelope sender address.
The <a href="VERP_README.html">VERP_README</a> file describes configuration and operation
- details of Postfix support for variable envelope return
+ 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.
+ 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 Postfix <a href="sendmail.1.html"><b>sendmail</b>(1)</a> command line
+ 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> ($<a href="postconf.5.html#mynetworks">mynetworks</a>)</b>
- What SMTP clients are allowed to specify the XVERP
+ What SMTP clients are allowed to specify the XVERP
command.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_authorized_verp_clients">smtpd_authorized_verp_clients</a> ($<a href="postconf.5.html#authorized_verp_clients">authorized_verp_clients</a>)</b>
- What SMTP clients are allowed to specify the XVERP
+ What SMTP clients are allowed to specify the XVERP
command.
<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 detail, to running some daemon pro-
+ 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 pro-
cesses 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
- remote client or server matches a pattern in the
+ The increment in verbose logging level when a
+ remote client or server matches a pattern in 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 remote client or server hostname
- or network address patterns that cause the verbose
- logging level to increase by the amount specified
+ Optional list of remote client or server hostname
+ or network address patterns that 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 problems that are caused by policy,
+ The recipient of postmaster notifications about
+ mail delivery problems that are caused by policy,
resource, software or protocol 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 sub-
- ject to before-queue content inspection by
+ What categories of Postfix-generated mail are sub-
+ ject 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
+ The list of error classes that are reported to the
postmaster.
<b><a href="postconf.5.html#soft_bounce">soft_bounce</a> (no)</b>
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_authorized_xclient_hosts">smtpd_authorized_xclient_hosts</a> (empty)</b>
- What SMTP clients are allowed to use the XCLIENT
+ What SMTP clients are allowed to use the XCLIENT
feature.
<b>KNOWN VERSUS UNKNOWN RECIPIENT CONTROLS</b>
- As of Postfix version 2.0, the SMTP server rejects mail
- for unknown recipients. This prevents the mail queue from
- clogging up with undeliverable MAILER-DAEMON messages.
- Additional information on this topic is in the
+ As of Postfix version 2.0, the SMTP server rejects mail
+ for unknown recipients. This prevents the mail queue from
+ clogging up with undeliverable 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
+ 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
+ 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>
<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>, local-</b>
<b>host)</b>
- The list of domains that are delivered via the
+ The list of domains that are delivered via the
$<a href="postconf.5.html#local_transport">local_transport</a> mail delivery transport.
<b><a href="postconf.5.html#inet_interfaces">inet_interfaces</a> (all)</b>
<b><a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a> (empty)</b>
The network interface addresses that this mail sys-
- tem receives mail on by way of a proxy or network
+ tem receives mail on by way of a proxy or network
address translation unit.
<b><a href="postconf.5.html#inet_protocols">inet_protocols</a> (ipv4)</b>
- The Internet protocols Postfix will attempt to use
+ The Internet protocols Postfix will attempt to use
when making or accepting connections.
<b><a href="postconf.5.html#local_recipient_maps">local_recipient_maps</a> (<a href="proxymap.8.html">proxy</a>:unix:passwd.byname</b>
<b>$<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">mydestination</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a> or
+ 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">mydestination</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 lookup
+ The numerical Postfix SMTP server response code
+ when a recipient address is local, and
+ $<a href="postconf.5.html#local_recipient_maps">local_recipient_maps</a> specifies a list of lookup
tables that does not match the recipient.
- Parameters concerning known/unknown recipients of relay
+ Parameters concerning known/unknown recipients of relay
destinations:
<b><a href="postconf.5.html#relay_domains">relay_domains</a> ($<a href="postconf.5.html#mydestination">mydestination</a>)</b>
- What destination domains (and subdomains thereof)
+ 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
+ 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> specifies a list of lookup
+ recipient address matches $<a href="postconf.5.html#relay_domains">relay_domains</a>, and
+ <a href="postconf.5.html#relay_recipient_maps">relay_recipient_maps</a> specifies a list of lookup
tables that does not match the recipient address.
- Parameters concerning known/unknown recipients in virtual
+ Parameters concerning known/unknown recipients in virtual
alias domains:
<b><a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a> ($<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 aliased to addresses in
+ 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 domains to other local or remote
+ 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 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">vir</a>-
- <a href="postconf.5.html#virtual_alias_maps">tual_alias_maps</a> specifies a list of lookup tables
+ matches
$<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, and $<a href="postconf.5.html#virtual_alias_maps">vir</a>-
+ <a href="postconf.5.html#virtual_alias_maps">tual_alias_maps</a> specifies a list of lookup tables
that does not match the recipient address.
- Parameters concerning known/unknown recipients in virtual
+ Parameters concerning known/unknown recipients in virtual
mailbox domains:
<b><a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a> ($<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">vir</a>-
+ of
domains; mail is delivered via the $<a href="postconf.5.html#virtual_transport">vir</a>-
<a href="postconf.5.html#virtual_transport">tual_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
+ 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 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">vir</a>-
+ matches
$<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>, and $<a href="postconf.5.html#virtual_mailbox_maps">vir</a>-
<a href="postconf.5.html#virtual_mailbox_maps">tual_mailbox_maps</a> specifies a list of lookup tables
that does not match the recipient address.
<b>RESOURCE AND RATE CONTROLS</b>
- The following parameters limit resource usage by the SMTP
+ The following parameters limit resource usage by the SMTP
server and/or 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 this length; upon delivery, long lines
+ 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>
- The minimal amount of free space in bytes in the
+ The minimal amount of free space in bytes in the
queue file system 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
+ 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
+ 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, stress: 10s)</b>
- The time limit for sending a Postfix SMTP server
- response and for receiving a remote SMTP client
+ 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
+ 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 that the name matches the client IP
+ and verify that the name matches the client IP
address.
The per SMTP client connection count and request rate lim-
its are implemented in co-operation with the <a href="anvil.8.html"><b>anvil</b>(8)</a> ser-
- vice, and are available in Postfix version 2.2 and later.
+ vice, 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
+ 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 to make to this service per time
+ 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
+ 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
+ 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 connection count,
+ Clients that are excluded from connection count,
connection rate, or SMTP request rate restrictions.
Available in Postfix version 2.3 and later:
tiate with this service per time unit.
<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 con-
- trolled by an error counter that counts the number of
- errors within an SMTP session that a client makes without
+ 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 con-
+ trolled 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 delivering
+ 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
+ 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, stress: 1)</b>
- The maximal number of errors a remote SMTP client
+ 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, stress: 1)</b>
- The number of junk commands (NOOP, VRFY, ETRN or
+ 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
+ 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 excess of the limit specified with
+ 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 count for
+ 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 file <a href="SMTPD_POLICY_README.html">SMTPD_POLICY_README</a> for
+ 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
+ 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>
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
+ The time limit for connecting to, writing to or
receiving from a delegated SMTPD policy server.
<b>ACCESS CONTROLS</b>
- The <a href="SMTPD_ACCESS_README.html">SMTPD_ACCESS_README</a> document gives an introduction to
+ 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>, $smtpd_helo_restric-
tions and $<a href="postconf.5.html#smtpd_sender_restrictions">smtpd_sender_restrictions</a>, or wait until
- the ETRN command before evaluating
+ the ETRN command before evaluating
$<a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a> and $smtpd_helo_restric-
tions.
- <b><a href="postconf.5.html#parent_domain_matches_subdomains">parent_domain_matches_subdomains</a> (see 'postconf -d' out-</b>
+ <b><a href="postconf.5.html#parent_domain_matches_subdomains">parent_domain_matches_subdomains</a> (see 'postconf -d' out-</b>
<b>put)</b>
What Postfix features match subdomains of
"domain.tld" automatically, instead of requiring an
explicit ".domain.tld" pattern.
<b><a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a> (empty)</b>
- Optional SMTP server access restrictions in the
+ Optional SMTP server access restrictions in the
context of a client SMTP 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
- at the beginning of an SMTP session with the HELO
+ at the beginning of an SMTP session with the HELO
or EHLO command.
<b><a href="postconf.5.html#smtpd_helo_restrictions">smtpd_helo_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server
+ Optional restrictions that the Postfix SMTP server
applies in the context of the SMTP HELO command.
<b><a href="postconf.5.html#smtpd_sender_restrictions">smtpd_sender_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server
+ Optional restrictions that the Postfix SMTP server
applies in the context of the MAIL FROM command.
<b><a href="postconf.5.html#smtpd_recipient_restrictions">smtpd_recipient_restrictions</a> (<a href="postconf.5.html#permit_mynetworks">permit_mynetworks</a>,</b>
<b><a href="postconf.5.html#reject_unauth_destination">reject_unauth_destination</a>)</b>
The access restrictions that the Postfix SMTP
- server applies in the context of the RCPT TO com-
+ server applies in the context of the RCPT TO com-
mand.
<b><a href="postconf.5.html#smtpd_etrn_restrictions">smtpd_etrn_restrictions</a> (empty)</b>
- Optional SMTP server access restrictions in the
+ Optional SMTP server access restrictions in the
context of a client ETRN request.
<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
+ Forward mail with sender-specified routing
+ (user[@%!]remote[@%!]site) from untrusted clients
to destinations 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 restric-
+ User-defined aliases for groups of access restric-
tions.
<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
+ 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 only domains whose primary MX
+ access feature to only domains whose primary MX
hosts match the listed networks.
Available in Postfix version 2.0 and later:
<b><a href="postconf.5.html#smtpd_data_restrictions">smtpd_data_restrictions</a> (empty)</b>
- Optional access restrictions that the Postfix SMTP
+ Optional access restrictions that the Postfix SMTP
server applies in the context of the SMTP DATA com-
mand.
<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
+ 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> access restriction
+ 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
+ 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 restric-
+ explicit <a href="postconf.5.html#reject_unlisted_recipient">reject_unlisted_recipient</a> access restric-
tion is specified.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtpd_end_of_data_restrictions">smtpd_end_of_data_restrictions</a> (empty)</b>
- Optional access restrictions that the Postfix SMTP
- server applies in the context of the SMTP END-OF-
+ Optional access restrictions that the Postfix SMTP
+ server applies in the context of the SMTP END-OF-
DATA command.
<b>SENDER AND RECIPIENT ADDRESS VERIFICATION CONTROLS</b>
- Postfix version 2.1 introduces sender and recipient
- address verification. This feature is implemented by
- sending probe email messages that are not actually deliv-
- ered. This feature is requested via the reject_unveri-
- fied_sender and <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> access
- restrictions. The status of verification probes is main-
+ Postfix version 2.1 introduces sender and recipient
+ address verification. This feature is implemented by
+ sending probe email messages that are not actually deliv-
+ ered. This feature is requested via the reject_unveri-
+ fied_sender and <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> access
+ restrictions. The status of verification probes is main-
tained by the <a href="verify.8.html"><b>verify</b>(8)</a> server. See the file <a href="ADDRESS_VERIFICATION_README.html">ADDRESS_VER</a>-
- <a href="ADDRESS_VERIFICATION_README.html">IFICATION_README</a> for information about how to configure
+ <a href="ADDRESS_VERIFICATION_README.html">IFICATION_README</a> for information about how to configure
and operate the Postfix sender/recipient address verifica-
tion service.
<b><a href="postconf.5.html#address_verify_poll_count">address_verify_poll_count</a> (3)</b>
- How many times to query the <a href="verify.8.html"><b>verify</b>(8)</a> service for
- the completion of an address verification request
+ How many times to query the <a href="verify.8.html"><b>verify</b>(8)</a> service for
+ the completion of an address verification request
in progress.
<b><a href="postconf.5.html#address_verify_poll_delay">address_verify_poll_delay</a> (3s)</b>
- The delay between queries for the completion of an
+ The delay between queries for the completion of an
address verification 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
+ The sender address to use in address verification
probes; prior to Postfix 2.5 the default was "post-
master".
<b><a href="postconf.5.html#unverified_sender_reject_code">unverified_sender_reject_code</a> (450)</b>
- The numerical Postfix SMTP server response code
- when a recipient address is rejected by the
+ The numerical Postfix SMTP server response code
+ when a recipient 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
+ The numerical Postfix SMTP server response when a
recipient address is rejected by the reject_unveri-
fied_recipient restriction.
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 address probe fails due to a tempo-
+ The numerical Postfix SMTP server response code
+ when a sender address probe fails due to a tempo-
rary 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 address probe fails due to a temporary
+ 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>
<b><a href="postconf.5.html#unverified_sender_tempfail_action">unverified_sender_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_temp</a>-</b>
<b><a href="postconf.5.html#reject_tempfail_action">fail_action</a>)</b>
The Postfix SMTP server's action when <a href="postconf.5.html#reject_unverified_sender">reject_unver</a>-
- <a href="postconf.5.html#reject_unverified_sender">ified_sender</a> fails due to a temporary error condi-
+ <a href="postconf.5.html#reject_unverified_sender">ified_sender</a> fails due to a temporary error condi-
tion.
<b><a href="postconf.5.html#unverified_recipient_tempfail_action">unverified_recipient_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_temp</a>-</b>
dition.
<b>ACCESS CONTROL RESPONSES</b>
- The following parameters control numerical SMTP reply
+ The following parameters control numerical SMTP reply
codes and/or text responses.
<b><a href="postconf.5.html#access_map_reject_code">access_map_reject_code</a> (554)</b>
an <a href="access.5.html"><b>access</b>(5)</a> 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 SMTP client request is rejected by
+ 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 <a href="postconf.5.html#reject_invalid_helo_hostname">reject_invalid_helo_hostname</a>
+ 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
+ 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_sender">reject_rhsbl_sender</a> or <a href="postconf.5.html#reject_rhsbl_recipient">reject_rhsbl_recipient</a>
<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
+ 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 is rejected by the <b>reject_plain-</b>
+ The numerical Postfix SMTP server response code
+ when a request is rejected by the <b>reject_plain-</b>
<b>text_session</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 SMTP client request is rejected by
+ 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
+ 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>
- The numerical Postfix SMTP server response code
- when a sender or recipient address is rejected by
+ The numerical Postfix SMTP server response code
+ when a sender or recipient address is rejected by
the <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> restriction.
<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 map-
+ The numerical Postfix SMTP server response code
+ when a client without valid address <=> name map-
ping is rejected by the reject_unknown_client_host-
name 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 hostname specified with the HELO or EHLO
- command is rejected by the
+ The numerical Postfix SMTP server response code
+ when the hostname 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 SMTP server response template for a
- request that is rejected by an RBL-based restric-
+ The default SMTP server response template for a
+ request that is rejected by an RBL-based restric-
tion.
<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
+ 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_recipient_bounce</a> restriction.
<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
+ 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 "<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 fails due to a temporary error condi-
+ restriction fails due to a temporary error condi-
tion.
<b><a href="postconf.5.html#unknown_helo_hostname_tempfail_action">unknown_helo_hostname_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_temp</a>-</b>
<b><a href="postconf.5.html#reject_tempfail_action">fail_action</a>)</b>
- The Postfix SMTP server's action when
+ The Postfix SMTP server's action when
<a href="postconf.5.html#reject_unknown_helo_hostname">reject_unknown_helo_hostname</a> fails due to an tempo-
rary error condition.
<b><a href="postconf.5.html#unknown_address_tempfail_action">unknown_address_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a>)</b>
- The Postfix SMTP server's action when
+ 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 tem-
+ <a href="postconf.5.html#reject_unknown_recipient_domain">reject_unknown_recipient_domain</a> fail due to a tem-
porary 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
+ The default location of the Postfix <a href="postconf.5.html">main.cf</a> and
<a href="master.5.html">master.cf</a> configuration 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 request before it is terminated by 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 com-
+ The location of all postfix administrative com-
mands.
<b><a href="postconf.5.html#double_bounce_sender">double_bounce_sender</a> (double-bounce)</b>
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 waits for an incoming connection
+ 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 maximal number of incoming connections that a
- Postfix daemon process will service before termi-
+ The maximal number of incoming connections that a
+ Postfix daemon process will service before termi-
nating voluntarily.
<b><a href="postconf.5.html#myhostname">myhostname</a> (see 'postconf -d' output)</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" SMTP clients that have more
+ The list of "trusted" SMTP clients that have more
privileges than "strangers".
<b><a href="postconf.5.html#myorigin">myorigin</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
The domain name that locally-posted mail appears to
- come from, and that locally posted mail is deliv-
+ come from, and that locally posted mail is deliv-
ered to.
<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
- The process ID of a Postfix command or daemon
+ The process ID of a Postfix command or daemon
process.
<b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
- The process name of a Postfix command or daemon
+ The process name of a Postfix command or daemon
process.
<b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
- The location of the Postfix top-level queue direc-
+ The location of the Postfix top-level queue direc-
tory.
<b><a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a> (empty)</b>
sions (user+foo).
<b><a href="postconf.5.html#smtpd_banner">smtpd_banner</a> ($<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
+ 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>
- The mail system name that is prepended to the
- process name in syslog records, so that "smtpd"
+ The mail system name that is prepended to the
+ process name in syslog records, so that "smtpd"
becomes, for example, "postfix/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 causes the Postfix SMTP
- server to immediately terminate the session with a
+ List of commands that causes the Postfix SMTP
+ server to immediately terminate the session with a
221 code.
Available in Postfix version 2.5 and later:
<b><a href="postconf.5.html#smtpd_client_port_logging">smtpd_client_port_logging</a> (no)</b>
- Enable logging of the remote SMTP client port in
+ Enable logging of the remote SMTP client port in
addition to the hostname and IP address.
<b>SEE ALSO</b>
<a href="XFORWARD_README.html">XFORWARD_README</a>, Postfix XFORWARD extension
<b>LICENSE</b>
- The Secure Mailer license must be distributed with this
+ The Secure Mailer license must be distributed with this
software.
<b>AUTHOR(S)</b>
.PP
Time units: s (seconds), m (minutes), h (hours), d (days), w (weeks).
The default time unit is s (seconds).
+.SH lmtp_reply_filter (default: empty)
+The LMTP-specific version of the smtp_reply_filter
+configuration parameter. See there for details.
+.PP
+This feature is available in Postfix 2.7 and later.
.SH lmtp_rset_timeout (default: 20s)
The LMTP client time limit for sending the RSET command, and
for receiving the server response. The LMTP client sends RSET in
configuration parameter. See there for details.
.PP
This feature is available in Postfix 2.3 and later.
+.SH lmtp_tls_block_early_mail_reply (default: empty)
+The LMTP-specific version of the smtp_tls_block_early_mail_reply
+configuration parameter. See there for details.
+.PP
+This feature is available in Postfix 2.7 and later.
.SH lmtp_tls_cert_file (default: empty)
The LMTP-specific version of the smtp_tls_cert_file
configuration parameter. See there for details.
.PP
Time units: s (seconds), m (minutes), h (hours), d (days), w (weeks).
The default time unit is s (seconds).
+.SH smtp_reply_filter (default: empty)
+A mechanism to transform replies from remote SMTP servers one
+line at a time. This is a last-resort tool to work around server
+replies that break inter-operability with the Postfix SMTP client.
+Other uses involve fault injection to test Postfix's handling of
+invalid responses.
+.PP
+Notes:
+.IP \(bu
+In the case of a multi-line reply, the Postfix SMTP client
+uses the last reply line's numerical SMTP reply code and enhanced
+status code.
+.IP \(bu
+The numerical SMTP reply code (XYZ) takes precedence over
+the enhanced status code (X.Y.Z). When the enhanced status code
+initial digit differs from the SMTP reply code initial digit, or
+when no enhanced status code is present, the Postfix SMTP client
+uses a generic enhanced status code (X.0.0) instead.
+.PP
+Specify the name of a "type:table" lookup table. The search
+string is a single SMTP reply line as received from the remote SMTP
+server, except that the trailing <CR><LF> are removed.
+.PP
+Examples:
+.PP
+.nf
+.na
+.ft C
+/etc/postfix/main.cf:
+ smtp_reply_filter = pcre:/etc/postfix/command_filter
+.fi
+.ad
+.ft R
+.PP
+.nf
+.na
+.ft C
+/etc/postfix/reply_filter:
+ # Transform garbage into part of a multi-line reply. Note
+ # that the Postfix SMTP client uses only the last numerical
+ # SMTP reply code and enhanced status code from a multi-line
+ # reply, so it does not matter what we substitute here as
+ # long as it has the right syntax.
+ !/^([2-5][0-9][0-9]($|[- ]))/ 250-filler for garbage
+.fi
+.ad
+.ft R
+.PP
+This feature is available in Postfix 2.7.
.SH smtp_rset_timeout (default: 20s)
The SMTP client time limit for sending the RSET command, and
for receiving the server response. The SMTP client sends RSET in
.SH smtp_tls_block_early_mail_reply (default: no)
Try to detect a mail hijacking attack based on a TLS protocol
vulnerability (CVE-2009-3555), where an attacker prepends malicious
-HELO/MAIL/RCPT/DATA commands to a Postfix client TLS session. The
-attack would succeed with non-Postfix SMTP servers that reply to
-the malicious HELO/MAIL/RCPT/DATA commands after negotiating the
-Postfix SMTP client TLS session.
+HELO, MAIL, RCPT, DATA commands to a Postfix SMTP client TLS session.
+The attack would succeed with non-Postfix SMTP servers that reply
+to the malicious HELO, MAIL, RCPT, DATA commands after negotiating
+the Postfix SMTP client TLS session.
.PP
This feature is available in Postfix 2.7.
.SH smtp_tls_cert_file (default: empty)
.ad
.ft R
.SH smtpd_command_filter (default: empty)
-A mechanism to substitute incoming SMTP commands. This is a
-last-resort tool to work around problems with clients that send
-invalid command syntax that would otherwise be rejected by Postfix.
+A mechanism to transform commands from remote SMTP clients.
+This is a last-resort tool to work around client commands that break
+inter-operability with the Postfix SMTP server. Other uses involve
+fault injection to test Postfix's handling of invalid commands.
.PP
Specify the name of a "type:table" lookup table. The search
-string is the SMTP command as received from the SMTP client, except
-that initial whitespace and the trailing <CR><LF> are removed. The
-result value is executed by the Postfix SMTP server.
+string is the SMTP command as received from the remote SMTP client,
+except that initial whitespace and the trailing <CR><LF>
+are removed. The result value is executed by the Postfix SMTP
+server.
.PP
Examples:
.PP
.IP "\fBsmtp_quote_rfc821_envelope (yes)\fR"
Quote addresses in SMTP MAIL FROM and RCPT TO commands as required
by RFC 2821.
+.IP "\fBsmtp_reply_filter (empty)\fR"
+A mechanism to transform replies from remote SMTP servers one
+line at a time.
.IP "\fBsmtp_skip_5xx_greeting (yes)\fR"
Skip SMTP servers that greet with a 5XX status code (go away, do
not try again later).
.IP "\fBsmtp_tls_block_early_mail_reply (no)\fR"
Try to detect a mail hijacking attack based on a TLS protocol
vulnerability (CVE-2009-3555), where an attacker prepends malicious
-HELO/MAIL/RCPT/DATA commands to a Postfix client TLS session.
+HELO, MAIL, RCPT, DATA commands to a Postfix SMTP client TLS session.
.SH "OBSOLETE STARTTLS CONTROLS"
.na
.nf
local hostname were specified, instead of rejecting the address as
invalid.
.IP "\fBsmtpd_command_filter (empty)\fR"
-A mechanism to substitute incoming SMTP commands.
+A mechanism to transform commands from remote SMTP clients.
.IP "\fBsmtpd_reject_unlisted_sender (no)\fR"
Request that the Postfix SMTP server rejects mail from unknown
sender addresses, even when no explicit reject_unlisted_sender
s;\bsmtp_mime_header_checks\b;<a href="postconf.5.html#smtp_mime_header_checks">$&</a>;g;
s;\bsmtp_nested_header_checks\b;<a href="postconf.5.html#smtp_nested_header_checks">$&</a>;g;
s;\bsmtp_body_checks\b;<a href="postconf.5.html#smtp_body_checks">$&</a>;g;
+ s;\bsmtp_reply_filter\b;<a href="postconf.5.html#smtp_reply_filter">$&</a>;g;
s;\bsmtpd_enforce_tls\b;<a href="postconf.5.html#smtpd_enforce_tls">$&</a>;g;
s;\bsmtpd_sasl_tls_security_options\b;<a href="postconf.5.html#smtpd_sasl_tls_security_options">$&</a>;g;
s;\bsmtpd_sasl_type\b;<a href="postconf.5.html#smtpd_sasl_type">$&</a>;g;
%PARAM smtpd_command_filter
-<p> A mechanism to substitute incoming SMTP commands. This is a
-last-resort tool to work around problems with clients that send
-invalid command syntax that would otherwise be rejected by Postfix.
+<p> A mechanism to transform commands from remote SMTP clients.
+This is a last-resort tool to work around client commands that break
+inter-operability with the Postfix SMTP server. Other uses involve
+fault injection to test Postfix's handling of invalid commands.
</p>
<p> Specify the name of a "type:table" lookup table. The search
-string is the SMTP command as received from the SMTP client, except
-that initial whitespace and the trailing <CR><LF> are removed. The
-result value is executed by the Postfix SMTP server. </p>
+string is the SMTP command as received from the remote SMTP client,
+except that initial whitespace and the trailing <CR><LF>
+are removed. The result value is executed by the Postfix SMTP
+server. </p>
<p> Examples: </p>
</pre>
<pre>
- # Work around clients that send RCPT TO:<'user@domain'>.
+ # Work around clients that send RCPT TO:<'user@domain'>.
# WARNING: do not lose the parameters that follow the address.
- /^RCPT\s+TO:\s*<'([^[:space:]]+)'>(.*)/ RCPT TO:<$1>$2
+ /^RCPT\s+TO:\s*<'([^[:space:]]+)'>(.*)/ RCPT TO:<$1>$2
</pre>
<p> This feature is available in Postfix 2.7. </p>
+%PARAM smtp_reply_filter
+
+<p> A mechanism to transform replies from remote SMTP servers one
+line at a time. This is a last-resort tool to work around server
+replies that break inter-operability with the Postfix SMTP client.
+Other uses involve fault injection to test Postfix's handling of
+invalid responses. </p>
+
+<p> Notes: </p>
+
+<ul>
+
+<li> <p> In the case of a multi-line reply, the Postfix SMTP client
+uses the last reply line's numerical SMTP reply code and enhanced
+status code. </p>
+
+<li> <p> The numerical SMTP reply code (XYZ) takes precedence over
+the enhanced status code (X.Y.Z). When the enhanced status code
+initial digit differs from the SMTP reply code initial digit, or
+when no enhanced status code is present, the Postfix SMTP client
+uses a generic enhanced status code (X.0.0) instead. </p>
+
+</ul>
+
+<p> Specify the name of a "type:table" lookup table. The search
+string is a single SMTP reply line as received from the remote SMTP
+server, except that the trailing <CR><LF> are removed. </p>
+
+<p> Examples: </p>
+
+<pre>
+/etc/postfix/main.cf:
+ smtp_reply_filter = pcre:/etc/postfix/command_filter
+</pre>
+
+<pre>
+/etc/postfix/reply_filter:
+ # Transform garbage into part of a multi-line reply. Note
+ # that the Postfix SMTP client uses only the last numerical
+ # SMTP reply code and enhanced status code from a multi-line
+ # reply, so it does not matter what we substitute here as
+ # long as it has the right syntax.
+ !/^([2-5][0-9][0-9]($|[- ]))/ 250-filler for garbage
+</pre>
+
+<p> This feature is available in Postfix 2.7. </p>
+
+%PARAM lmtp_reply_filter
+
+<p> The LMTP-specific version of the smtp_reply_filter
+configuration parameter. See there for details. </p>
+
+<p> This feature is available in Postfix 2.7 and later. </p>
+
%PARAM smtp_tls_block_early_mail_reply no
<p> Try to detect a mail hijacking attack based on a TLS protocol
vulnerability (CVE-2009-3555), where an attacker prepends malicious
-HELO/MAIL/RCPT/DATA commands to a Postfix client TLS session. The
-attack would succeed with non-Postfix SMTP servers that reply to
-the malicious HELO/MAIL/RCPT/DATA commands after negotiating the
-Postfix SMTP client TLS session. </p>
+HELO, MAIL, RCPT, DATA commands to a Postfix SMTP client TLS session.
+The attack would succeed with non-Postfix SMTP servers that reply
+to the malicious HELO, MAIL, RCPT, DATA commands after negotiating
+the Postfix SMTP client TLS session. </p>
<p> This feature is available in Postfix 2.7. </p>
+
+%PARAM lmtp_tls_block_early_mail_reply
+
+<p> The LMTP-specific version of the smtp_tls_block_early_mail_reply
+configuration parameter. See there for details. </p>
+
+<p> This feature is available in Postfix 2.7 and later. </p>
#define DEF_SMTP_NEVER_EHLO 0
extern bool var_smtp_never_ehlo;
+#define VAR_SMTP_RESP_FILTER "smtp_reply_filter"
+#define DEF_SMTP_RESP_FILTER ""
+#define VAR_LMTP_RESP_FILTER "lmtp_reply_filter"
+#define DEF_LMTP_RESP_FILTER ""
+extern char *var_smtp_resp_filter;
+
#define VAR_SMTP_BIND_ADDR "smtp_bind_address"
#define DEF_SMTP_BIND_ADDR ""
#define VAR_LMTP_BIND_ADDR "lmtp_bind_address"
* Patches change both the patchlevel and the release date. Snapshots have no
* patchlevel; they change the release date only.
*/
-#define MAIL_RELEASE_DATE "20091110"
+#define MAIL_RELEASE_DATE "20091115"
#define MAIL_VERSION_NUMBER "2.7"
#ifdef SNAPSHOT
smtp_connect.o: ../../include/htable.h
smtp_connect.o: ../../include/inet_addr_list.h
smtp_connect.o: ../../include/iostuff.h
+smtp_connect.o: ../../include/mail_addr.h
smtp_connect.o: ../../include/mail_error.h
smtp_connect.o: ../../include/mail_params.h
smtp_connect.o: ../../include/mail_proto.h
VAR_LMTP_MIME_CHKS, DEF_LMTP_MIME_CHKS, &var_smtp_mime_chks, 0, 0,
VAR_LMTP_NEST_CHKS, DEF_LMTP_NEST_CHKS, &var_smtp_nest_chks, 0, 0,
VAR_LMTP_BODY_CHKS, DEF_LMTP_BODY_CHKS, &var_smtp_body_chks, 0, 0,
+ VAR_LMTP_RESP_FILTER, DEF_LMTP_RESP_FILTER, &var_smtp_resp_filter, 0, 0,
0,
};
static const CONFIG_TIME_TABLE lmtp_time_table[] = {
/* .IP "\fBsmtp_quote_rfc821_envelope (yes)\fR"
/* Quote addresses in SMTP MAIL FROM and RCPT TO commands as required
/* by RFC 2821.
+/* .IP "\fBsmtp_reply_filter (empty)\fR"
+/* A mechanism to transform replies from remote SMTP servers one
+/* line at a time.
/* .IP "\fBsmtp_skip_5xx_greeting (yes)\fR"
/* Skip SMTP servers that greet with a 5XX status code (go away, do
/* not try again later).
/* .IP "\fBsmtp_tls_block_early_mail_reply (no)\fR"
/* Try to detect a mail hijacking attack based on a TLS protocol
/* vulnerability (CVE-2009-3555), where an attacker prepends malicious
-/* HELO/MAIL/RCPT/DATA commands to a Postfix client TLS session.
+/* HELO, MAIL, RCPT, DATA commands to a Postfix SMTP client TLS session.
/* OBSOLETE STARTTLS CONTROLS
/* .ad
/* .fi
char *var_smtp_mime_chks;
char *var_smtp_nest_chks;
char *var_smtp_body_chks;
+char *var_smtp_resp_filter;
bool var_lmtp_assume_final;
/* Special handling of 535 AUTH errors. */
smtp_body_checks = hbc_body_checks_create(
VAR_SMTP_BODY_CHKS, var_smtp_body_chks,
smtp_hbc_callbacks);
+
+ /*
+ * Server reply filter.
+ */
+ if (*var_smtp_resp_filter)
+ smtp_chat_resp_filter =
+ dict_open(var_smtp_resp_filter, O_RDONLY,
+ DICT_FLAG_LOCK | DICT_FLAG_FOLD_FIX);
}
/* pre_accept - see if tables have changed */
#include <vstring.h>
#include <argv.h>
#include <htable.h>
+#include <dict.h>
/*
* Global library.
VSTRING *str_buf; /* reply buffer */
} SMTP_RESP;
-extern void PRINTFLIKE(2, 3) smtp_chat_cmd(SMTP_SESSION *, char *,...);
+extern void PRINTFLIKE(2, 3) smtp_chat_cmd(SMTP_SESSION *, const char *,...);
+extern DICT *smtp_chat_resp_filter;
extern SMTP_RESP *smtp_chat_resp(SMTP_SESSION *);
extern void smtp_chat_init(SMTP_SESSION *);
extern void smtp_chat_reset(SMTP_SESSION *);
/*
/* void smtp_chat_cmd(session, format, ...)
/* SMTP_SESSION *session;
-/* char *format;
+/* const char *format;
+/*
+/* DICT *smtp_chat_resp_filter;
/*
/* SMTP_RESP *smtp_chat_resp(session)
/* SMTP_SESSION *session;
/* the client and server get out of step due to a broken proxy
/* agent.
/* .PP
+/* smtp_chat_resp_filter specifies an optional filter to
+/* transform one server reply line before it is parsed. The
+/* filter is invoked once for each line of a multi-line reply.
+/*
/* smtp_chat_notify() sends a copy of the SMTP transaction log
/* to the postmaster for review. The postmaster notice is sent only
/* when delivery is possible immediately. It is an error to call
#include <stdlib.h>
#include <setjmp.h>
#include <string.h>
+#include <limits.h>
/* Utility library. */
#include "smtp.h"
+ /*
+ * Server reply transformations.
+ */
+DICT *smtp_chat_resp_filter;
+
/* smtp_chat_init - initialize SMTP transaction log */
void smtp_chat_init(SMTP_SESSION *session)
/* smtp_chat_append - append record to SMTP transaction log */
-static void smtp_chat_append(SMTP_SESSION *session, char *direction, char *data)
+static void smtp_chat_append(SMTP_SESSION *session, const char *direction,
+ const char *data)
{
char *line;
/* smtp_chat_cmd - send an SMTP command */
-void smtp_chat_cmd(SMTP_SESSION *session, char *fmt,...)
+void smtp_chat_cmd(SMTP_SESSION *session, const char *fmt,...)
{
va_list ap;
int last_char;
int three_digs = 0;
size_t len;
+ const char *new_reply;
+ int chat_append_flag;
+ int chat_append_skipped = 0;
/*
* Initialize the response data buffer.
* Defend against a denial of service attack by limiting the amount
* of multi-line text that we are willing to store.
*/
- if (LEN(rdata.str_buf) < var_line_limit) {
+ chat_append_flag = (LEN(rdata.str_buf) < var_line_limit);
+ if (chat_append_flag)
+ smtp_chat_append(session, "In: ", STR(session->buffer));
+ else {
+ if (chat_append_skipped == 0)
+ msg_warn("%s: multi-line response longer than %d %.30s...",
+ session->namaddrport, var_line_limit, STR(rdata.str_buf));
+ if (chat_append_skipped < INT_MAX)
+ chat_append_skipped++;
+ }
+
+ /*
+ * Server reply substitution, for fault-injection testing, or for
+ * working around broken systems. Use with care.
+ */
+ if (smtp_chat_resp_filter != 0) {
+ new_reply = dict_get(smtp_chat_resp_filter, STR(session->buffer));
+ if (new_reply != 0) {
+ msg_info("%s: replacing server reply \"%s\" with \"%s\"",
+ session->namaddrport, STR(session->buffer), new_reply);
+ vstring_strcpy(session->buffer, new_reply);
+ if (chat_append_flag) {
+ smtp_chat_append(session, "Replaced-by: ", "");
+ smtp_chat_append(session, " ", new_reply);
+ }
+ }
+ }
+ if (chat_append_flag) {
if (LEN(rdata.str_buf))
VSTRING_ADDCH(rdata.str_buf, '\n');
vstring_strcat(rdata.str_buf, STR(session->buffer));
- smtp_chat_append(session, "In: ", STR(session->buffer));
}
/*
- * Parse into code and text. Ignore unrecognized garbage. This means
- * that any character except space (or end of line) will have the
- * same effect as the '-' line continuation character.
+ * Parse into code and text. Do not ignore garbage (see below).
*/
for (cp = STR(session->buffer); *cp && ISDIGIT(*cp); cp++)
/* void */ ;
#include <deliver_pass.h>
#include <mail_error.h>
#include <dsn_buf.h>
+#include <mail_addr.h>
/* DNS library. */
/*
* Inform the postmaster of trouble.
+ *
+ * XXX Don't send notifications about errors while sending notifications.
*/
+#define POSSIBLE_NOTIFICATION(sender) \
+ (*sender == 0 || strcmp(sender, mail_addr_double_bounce()) == 0)
+
if (session->history != 0
&& (session->error_mask & name_mask(VAR_NOTIFY_CLASSES,
mail_error_masks,
- var_notify_classes)) != 0)
+ var_notify_classes)) != 0
+ && POSSIBLE_NOTIFICATION(request->sender) == 0)
smtp_chat_notify(session);
/*
VAR_SMTP_MIME_CHKS, DEF_SMTP_MIME_CHKS, &var_smtp_mime_chks, 0, 0,
VAR_SMTP_NEST_CHKS, DEF_SMTP_NEST_CHKS, &var_smtp_nest_chks, 0, 0,
VAR_SMTP_BODY_CHKS, DEF_SMTP_BODY_CHKS, &var_smtp_body_chks, 0, 0,
+ VAR_SMTP_RESP_FILTER, DEF_SMTP_RESP_FILTER, &var_smtp_resp_filter, 0, 0,
0,
};
static const CONFIG_TIME_TABLE smtp_time_table[] = {
* cycles.
*/
VSTRING_RESET(why->reason);
- if (mta_name && reply && reply[0] != '4' && reply[0] != '5') {
+ if (mta_name && status && status[0] != '4' && status[0] != '5') {
vstring_strcpy(why->reason, "Protocol error: ");
status = "5.5.0";
}
/* local hostname were specified, instead of rejecting the address as
/* invalid.
/* .IP "\fBsmtpd_command_filter (empty)\fR"
-/* A mechanism to substitute incoming SMTP commands.
+/* A mechanism to transform commands from remote SMTP clients.
/* .IP "\fBsmtpd_reject_unlisted_sender (no)\fR"
/* Request that the Postfix SMTP server rejects mail from unknown
/* sender addresses, even when no explicit reject_unlisted_sender
}
watchdog_pat();
smtpd_chat_query(state);
+ /* Move into smtpd_chat_query() and update session transcript. */
if (smtpd_cmd_filter != 0) {
for (cp = STR(state->buffer); *cp && IS_SPACE_TAB(*cp); cp++)
/* void */ ;
- if ((cp = dict_get(smtpd_cmd_filter, cp)) != 0)
+ if ((cp = dict_get(smtpd_cmd_filter, cp)) != 0) {
+ msg_info("%s: replacing client command \"%s\" with \"%s\"",
+ state->namaddr, STR(state->buffer), cp);
vstring_strcpy(state->buffer, cp);
+ }
}
if ((argc = smtpd_token(vstring_str(state->buffer), &argv)) == 0) {
state->error_mask |= MAIL_ERROR_PROTOCOL;
/* System library. */
#include <sys_defs.h>
-#include <sys/stat.h>
#include <ctype.h>
#include <unistd.h>
*/
if (vstream_ferror(smtpd_proxy_replay_stream)
|| vstream_feof(smtpd_proxy_replay_stream)
+ || rec_put(smtpd_proxy_replay_stream, REC_TYPE_END, "", 0) != REC_TYPE_END
|| vstream_fflush(smtpd_proxy_replay_stream))
/* NOT: fsync(vstream_fileno(smtpd_proxy_replay_stream)) */
return (smtpd_proxy_replay_rdwr_error(state));
break;
/*
- * End of replay log.
+ * Explicit end marker, instead of implicit EOF.
*/
- case REC_TYPE_EOF:
+ case REC_TYPE_END:
return (0);
/*
static int smtpd_proxy_replay_setup(SMTPD_STATE *state)
{
const char *myname = "smtpd_proxy_replay_setup";
- struct stat st;
+ off_t file_offs;
/*
* Where possible reuse an existing replay logfile, because creating a
* we must truncate the file before reuse. For performance reasons we
* should truncate the file immediately after the end of a mail
* transaction. We enforce the security guarantee here by requiring that
- * the file is emtpy when it is reused. This is less expensive than
- * truncating the file redundantly.
+ * no I/O happened since the file was truncated. This is less expensive
+ * than truncating the file redundantly.
*/
if (smtpd_proxy_replay_stream != 0) {
- if (vstream_fseek(smtpd_proxy_replay_stream, (off_t) 0, SEEK_SET) < 0) {
- msg_warn("seek before-queue filter speed-adjust log: %m");
- (void) vstream_fclose(smtpd_proxy_replay_stream);
- smtpd_proxy_replay_stream = 0;
- } else if (fstat(vstream_fileno(smtpd_proxy_replay_stream), &st) < 0) {
- msg_warn("fstat before-queue filter speed-adjust log: %m");
- (void) vstream_fclose(smtpd_proxy_replay_stream);
- smtpd_proxy_replay_stream = 0;
- } else {
- if (st.st_size > 0)
- msg_panic("%s: non-empty before-queue filter speed-adjust log",
- myname);
- vstream_clearerr(smtpd_proxy_replay_stream);
- if (msg_verbose)
- msg_info("%s: reuse speed-adjust stream fd=%d", myname,
- vstream_fileno(smtpd_proxy_replay_stream));
- /* Here, smtpd_proxy_replay_stream != 0 */
- }
+ /* vstream_ftell() won't invoke the kernel, so all errors are mine. */
+ if ((file_offs = vstream_ftell(smtpd_proxy_replay_stream)) != 0)
+ msg_panic("%s: bad before-queue filter speed-adjust log offset %lu",
+ myname, (unsigned long) file_offs);
+ vstream_clearerr(smtpd_proxy_replay_stream);
+ if (msg_verbose)
+ msg_info("%s: reuse speed-adjust stream fd=%d", myname,
+ vstream_fileno(smtpd_proxy_replay_stream));
+ /* Here, smtpd_proxy_replay_stream != 0 */
}
/*
(p)->a3, (p)->a4, (p)->a5, (p)->a6, (p)->a7, (p)->a8, (p)->a9, \
(p)->a10, (p)->a11, (p))
+ /*
+ * Sanity check.
+ */
+ if (state->proxy != 0)
+ msg_panic("smtpd_proxy_create: handle still exists");
+
/*
* Connect to the before-queue filter immediately.
*/
* truncate the replay logfile before reuse. For performance reasons we
* should truncate the replay logfile immediately after the end of a mail
* transaction. We truncate the file here, and enforce the security
- * guarantee by requiring that the file is empty when it is reused.
+ * guarantee by requiring that no I/O happens before the file is reused.
*/
if (smtpd_proxy_replay_stream == 0)
return;
if (vstream_ferror(smtpd_proxy_replay_stream)) {
+ /* Errors are already reported. */
+ (void) vstream_fclose(smtpd_proxy_replay_stream);
+ smtpd_proxy_replay_stream = 0;
+ return;
+ }
+ /* Flush output from aborted transaction before truncating the file!! */
+ if (vstream_fseek(smtpd_proxy_replay_stream, (off_t) 0, SEEK_SET) < 0) {
+ msg_warn("seek before-queue filter speed-adjust log: %m");
(void) vstream_fclose(smtpd_proxy_replay_stream);
smtpd_proxy_replay_stream = 0;
return;
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (!(ifa->ifa_flags & IFF_UP) || ifa->ifa_addr == 0)
continue;
- /* XXX Should we cons up a default mask instead? */
- if (ifa->ifa_netmask == 0)
- continue;
sa = ifa->ifa_addr;
- sam = ifa->ifa_netmask;
if (af != AF_UNSPEC && sa->sa_family != af)
continue;
+ sam = ifa->ifa_netmask;
+ if (sam == 0) {
+ /* XXX In mynetworks, a null netmask would match everyone. */
+ msg_warn("ignoring interface with null netmask, address family %d",
+ sa->sa_family);
+ continue;
+ }
switch (sa->sa_family) {
case AF_INET:
if (SOCK_ADDR_IN_ADDR(sa).s_addr == INADDR_ANY)
msg_vstream_init(argv[0], VSTREAM_ERR);
msg_verbose = 1;
- proto_info = inet_proto_init(argv[0], INET_PROTO_NAME_ALL);
+ proto_info = inet_proto_init(argv[0],
+ argv[1] ? argv[1] : INET_PROTO_NAME_ALL);
inet_addr_list_init(&addr_list);
inet_addr_list_init(&mask_list);
inet_addr_local(&addr_list, &mask_list, proto_info->ai_family_list);
#define HAS_DUPLEX_PIPE /* 4.1 breaks with kqueue(2) */
#endif
-#if __FreeBSD_version >= 800098 /* commit: r194262 */
+#if __FreeBSD_version >= 800107 /* safe; don't believe the experts */
#define HAS_CLOSEFROM
#endif
projects / thirdparty / postfix.git / commitdiff
