smtp/smtp_proto.c, tls/tls.h, tls/tls_proxy_client_misc.c,
tls/tls_proxy_client_print.c, tls/tls_proxy_client_scan.c,
tls/tls_proxy.h, tlsproxy/tlsproxy.c.
+
+20230524
+
+ Cleanup: reverted cosmetic-only changes to minimize the
+ patch footprint for OpenSSL INI file support for stable
+ releases; updated daemon manpages with the new tls_config_file
+ and tls_config_name configuration parameters. Files:
+ smtp/smtp.c, smtpd/smtpd.c, tls/tls_client.c, tls/tls.h,
+ tls/tls_server.c, tlsproxy/tlsproxy.c,
(FFDHE) key exchange groups supported by the Postfix SMTP client
and server.
+ Available in Postfix version 3.9 and later:
+
+ <b><a href="postconf.5.html#tls_config_file">tls_config_file</a> (default)</b>
+ Optional configuration file with baseline OpenSSL settings.
+
+ <b><a href="postconf.5.html#tls_config_name">tls_config_name</a> (empty)</b>
+ The application name passed by Postfix to OpenSSL library ini-
+ tialization functions.
+
<b>OBSOLETE STARTTLS CONTROLS</b>
- The following configuration parameters exist for compatibility with
- Postfix versions before 2.3. Support for these will be removed in a
+ The following configuration parameters exist for compatibility with
+ Postfix versions before 2.3. Support for these will be removed in a
future release.
<b><a href="postconf.5.html#smtp_use_tls">smtp_use_tls</a> (no)</b>
- Opportunistic mode: use TLS when a remote SMTP server announces
+ Opportunistic mode: use TLS when a remote SMTP server announces
STARTTLS support, otherwise send the mail in the clear.
<b><a href="postconf.5.html#smtp_enforce_tls">smtp_enforce_tls</a> (no)</b>
- Enforcement mode: require that remote SMTP servers use TLS
+ Enforcement mode: require that remote SMTP servers use TLS
encryption, and never send mail in the clear.
<b><a href="postconf.5.html#smtp_tls_enforce_peername">smtp_tls_enforce_peername</a> (yes)</b>
- With mandatory TLS encryption, require that the remote SMTP
- server hostname matches the information in the remote SMTP
+ With mandatory TLS encryption, require that the remote SMTP
+ server hostname matches the information in the remote SMTP
server certificate.
<b><a href="postconf.5.html#smtp_tls_per_site">smtp_tls_per_site</a> (empty)</b>
- Optional lookup tables with the Postfix SMTP client TLS usage
- policy by next-hop destination and by remote SMTP server host-
+ Optional lookup tables with the Postfix SMTP client TLS usage
+ policy by next-hop destination and by remote SMTP server host-
name.
<b><a href="postconf.5.html#smtp_tls_cipherlist">smtp_tls_cipherlist</a> (empty)</b>
- Obsolete Postfix < 2.3 control for the Postfix SMTP client TLS
+ Obsolete Postfix < 2.3 control for the Postfix SMTP client TLS
cipher list.
<b>RESOURCE AND RATE CONTROLS</b>
<b><a href="postconf.5.html#smtp_connect_timeout">smtp_connect_timeout</a> (30s)</b>
- The Postfix SMTP client time limit for completing a TCP connec-
+ The Postfix SMTP client time limit for completing a TCP connec-
tion, or zero (use the operating system built-in time limit).
<b><a href="postconf.5.html#smtp_helo_timeout">smtp_helo_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the HELO or EHLO
- command, and for receiving the initial remote SMTP server
+ The Postfix SMTP client time limit for sending the HELO or EHLO
+ command, and for receiving the initial remote SMTP server
response.
<b><a href="postconf.5.html#lmtp_lhlo_timeout">lmtp_lhlo_timeout</a> (300s)</b>
mand, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_mail_timeout">smtp_mail_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the MAIL FROM
+ The Postfix SMTP client time limit for sending the MAIL FROM
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_rcpt_timeout">smtp_rcpt_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the SMTP RCPT TO
+ The Postfix SMTP client time limit for sending the SMTP RCPT TO
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_data_init_timeout">smtp_data_init_timeout</a> (120s)</b>
- The Postfix SMTP client time limit for sending the SMTP DATA
+ The Postfix SMTP client time limit for sending the SMTP DATA
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_data_xfer_timeout">smtp_data_xfer_timeout</a> (180s)</b>
- The Postfix SMTP client time limit for sending the SMTP message
+ The Postfix SMTP client time limit for sending the SMTP message
content.
<b><a href="postconf.5.html#smtp_data_done_timeout">smtp_data_done_timeout</a> (600s)</b>
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtp_mx_address_limit">smtp_mx_address_limit</a> (5)</b>
- The maximal number of MX (mail exchanger) IP addresses that can
- result from Postfix SMTP client mail exchanger lookups, or zero
+ The maximal number of MX (mail exchanger) IP addresses that can
+ result from Postfix SMTP client mail exchanger lookups, or zero
(no limit).
<b><a href="postconf.5.html#smtp_mx_session_limit">smtp_mx_session_limit</a> (2)</b>
- The maximal number of SMTP sessions per delivery request before
- the Postfix SMTP client gives up or delivers to a fall-back
+ The maximal number of SMTP sessions per delivery request before
+ the Postfix SMTP client gives up or delivers to a fall-back
<a href="postconf.5.html#relayhost">relay host</a>, or zero (no limit).
<b><a href="postconf.5.html#smtp_rset_timeout">smtp_rset_timeout</a> (20s)</b>
Available in Postfix version 2.2 and earlier:
<b><a href="postconf.5.html#lmtp_cache_connection">lmtp_cache_connection</a> (yes)</b>
- Keep
Postfix LMTP client connections open for up to $<a href="postconf.5.html#max_idle">max_idle</a>
+ Keep
Postfix LMTP client connections open for up to $<a href="postconf.5.html#max_idle">max_idle</a>
seconds.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtp_connection_cache_destinations">smtp_connection_cache_destinations</a> (empty)</b>
- Permanently enable SMTP connection caching for the specified
+ Permanently enable SMTP connection caching for the specified
destinations.
<b><a href="postconf.5.html#smtp_connection_cache_on_demand">smtp_connection_cache_on_demand</a> (yes)</b>
- Temporarily enable SMTP connection caching while a destination
+ Temporarily enable SMTP connection caching while a destination
has a high volume of mail in the <a href="QSHAPE_README.html#active_queue">active queue</a>.
<b><a href="postconf.5.html#smtp_connection_reuse_time_limit">smtp_connection_reuse_time_limit</a> (300s)</b>
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#connection_cache_protocol_timeout">connection_cache_protocol_timeout</a> (5s)</b>
- Time limit for connection cache connect, send or receive opera-
+ Time limit for connection cache connect, send or receive opera-
tions.
Available in Postfix version 2.9 - 3.6:
<b><a href="postconf.5.html#smtp_per_record_deadline">smtp_per_record_deadline</a> (no)</b>
- Change the behavior of the smtp_*_timeout time limits, from a
- time limit per read or write system call, to a time limit to
- send or receive a complete record (an SMTP command line, SMTP
- response line, SMTP message content line, or TLS protocol mes-
+ Change the behavior of the smtp_*_timeout time limits, from a
+ time limit per read or write system call, to a time limit to
+ send or receive a complete record (an SMTP command line, SMTP
+ response line, SMTP message content line, or TLS protocol mes-
sage).
Available in Postfix version 2.11 and later:
<b><a href="postconf.5.html#smtp_connection_reuse_count_limit">smtp_connection_reuse_count_limit</a> (0)</b>
- When SMTP connection caching is enabled, the number of times
- that an SMTP session may be reused before it is closed, or zero
+ When SMTP connection caching is enabled, the number of times
+ that an SMTP session may be reused before it is closed, or zero
(no limit).
Available in Postfix version 3.4 and later:
Available in Postfix version 3.7 and later:
<b><a href="postconf.5.html#smtp_per_request_deadline">smtp_per_request_deadline</a> (no)</b>
- Change the behavior of the smtp_*_timeout time limits, from a
- time limit per plaintext or TLS read or write call, to a com-
- bined time limit for sending a complete SMTP request and for
+ Change the behavior of the smtp_*_timeout time limits, from a
+ time limit per plaintext or TLS read or write call, to a com-
+ bined time limit for sending a complete SMTP request and for
receiving a complete SMTP response.
<b><a href="postconf.5.html#smtp_min_data_rate">smtp_min_data_rate</a> (500)</b>
- The minimum plaintext data transfer rate in bytes/second for
+ The minimum plaintext data transfer rate in bytes/second for
DATA requests, when deadlines are enabled with
<a href="postconf.5.html#smtp_per_request_deadline">smtp_per_request_deadline</a>.
<b><a href="postconf.5.html#transport_destination_concurrency_limit">transport_destination_concurrency_limit</a> ($<a href="postconf.5.html#default_destination_concurrency_limit">default_destination_concur</a>-</b>
<b><a href="postconf.5.html#default_destination_concurrency_limit">rency_limit</a>)</b>
- A
transport-specific override for the <a href="postconf.5.html#default_destination_concurrency_limit">default_destination_con</a>-
+ A
transport-specific override for the <a href="postconf.5.html#default_destination_concurrency_limit">default_destination_con</a>-
<a href="postconf.5.html#default_destination_concurrency_limit">currency_limit</a> parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
name of the message delivery transport.
<b><a href="postconf.5.html#transport_destination_recipient_limit">transport_destination_recipient_limit</a> ($<a href="postconf.5.html#default_destination_recipient_limit">default_destination_recipi</a>-</b>
<b><a href="postconf.5.html#default_destination_recipient_limit">ent_limit</a>)</b>
A transport-specific override for the <a href="postconf.5.html#default_destination_recipient_limit">default_destination_recip</a>-
- <a href="postconf.5.html#default_destination_recipient_limit">ient_limit</a>
parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
+ <a href="postconf.5.html#default_destination_recipient_limit">ient_limit</a>
parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
name of the message delivery transport.
<b>SMTPUTF8 CONTROLS</b>
Preliminary SMTPUTF8 support is introduced with Postfix 3.0.
<b><a href="postconf.5.html#smtputf8_enable">smtputf8_enable</a> (yes)</b>
- Enable preliminary SMTPUTF8 support for the protocols described
+ Enable preliminary SMTPUTF8 support for the protocols described
in <a href="https://tools.ietf.org/html/rfc6531">RFC 6531</a>, <a href="https://tools.ietf.org/html/rfc6532">RFC 6532</a>, and <a href="https://tools.ietf.org/html/rfc6533">RFC 6533</a>.
<b><a href="postconf.5.html#smtputf8_autodetect_classes">smtputf8_autodetect_classes</a> (sendmail, verify)</b>
- Detect that a message requires SMTPUTF8 support for the speci-
+ Detect that a message requires SMTPUTF8 support for the speci-
fied mail origin classes.
Available in Postfix version 3.2 and later:
<b><a href="postconf.5.html#enable_idna2003_compatibility">enable_idna2003_compatibility</a> (no)</b>
- Enable 'transitional' compatibility between IDNA2003 and
- IDNA2008, when converting UTF-8 domain names to/from the ASCII
+ Enable 'transitional' compatibility between IDNA2003 and
+ IDNA2008, when converting UTF-8 domain names to/from the ASCII
form that is used for DNS lookups.
<b>TROUBLE SHOOTING CONTROLS</b>
<b><a href="postconf.5.html#debug_peer_level">debug_peer_level</a> (2)</b>
- The increment in verbose logging level when a nexthop destina-
- tion, remote client or server name or network address matches a
+ The increment in verbose logging level when a nexthop destina-
+ tion, remote client or server name or network address matches a
pattern given with the <a href="postconf.5.html#debug_peer_list">debug_peer_list</a> parameter.
<b><a href="postconf.5.html#debug_peer_list">debug_peer_list</a> (empty)</b>
- Optional list of nexthop destination, remote client or server
- name or network address patterns that, if matched, cause the
- verbose logging level to increase by the amount specified in
+ Optional list of nexthop destination, remote client or server
+ name or network address patterns that, if matched, cause the
+ verbose logging level to increase by the amount specified in
$<a href="postconf.5.html#debug_peer_level">debug_peer_level</a>.
<b><a href="postconf.5.html#error_notice_recipient">error_notice_recipient</a> (postmaster)</b>
- The recipient of postmaster notifications about mail delivery
+ The recipient of postmaster notifications about mail delivery
problems that are caused by policy, resource, software or proto-
col errors.
<b><a href="postconf.5.html#internal_mail_filter_classes">internal_mail_filter_classes</a> (empty)</b>
- What categories of Postfix-generated mail are subject to
- before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
+ What categories of Postfix-generated mail are subject to
+ before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
<a href="postconf.5.html#header_checks">header_checks</a> and <a href="postconf.5.html#body_checks">body_checks</a>.
<b><a href="postconf.5.html#notify_classes">notify_classes</a> (resource, software)</b>
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#best_mx_transport">best_mx_transport</a> (empty)</b>
- Where the Postfix SMTP client should deliver mail when it
+ Where the Postfix SMTP client should deliver mail when it
detects a "mail loops back to myself" error condition.
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
- The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
+ The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
figuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
- How much time a Postfix daemon process may take to handle a
+ How much time a Postfix daemon process may take to handle a
request before it is terminated by a built-in watchdog timer.
<b><a href="postconf.5.html#delay_logging_resolution_limit">delay_logging_resolution_limit</a> (2)</b>
- The maximal number of digits after the decimal point when log-
+ The maximal number of digits after the decimal point when log-
ging sub-second delay values.
<b><a href="postconf.5.html#disable_dns_lookups">disable_dns_lookups</a> (no)</b>
Disable DNS lookups in the Postfix SMTP and LMTP clients.
<b><a href="postconf.5.html#inet_interfaces">inet_interfaces</a> (all)</b>
- The local network interface addresses that this mail system
+ The local network interface addresses that this mail system
receives mail on.
<b><a href="postconf.5.html#inet_protocols">inet_protocols</a> (see 'postconf -d output')</b>
- The Internet protocols Postfix will attempt to use when making
+ The Internet protocols Postfix will attempt to use when making
or accepting connections.
<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
- The time limit for sending or receiving information over an
+ The time limit for sending or receiving information over an
internal communication channel.
<b><a href="postconf.5.html#lmtp_assume_final">lmtp_assume_final</a> (no)</b>
- When a remote LMTP server announces no DSN support, assume that
- the server performs final delivery, and send "delivered" deliv-
+ When a remote LMTP server announces no DSN support, assume that
+ the server performs final delivery, and send "delivered" deliv-
ery status notifications instead of "relayed".
<b><a href="postconf.5.html#lmtp_tcp_port">lmtp_tcp_port</a> (24)</b>
The default TCP port that the Postfix LMTP client connects to.
<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
- The maximum amount of time that an idle Postfix daemon process
+ The maximum amount of time that an idle Postfix daemon process
waits for an incoming connection before terminating voluntarily.
<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
The process name of a Postfix command or daemon process.
<b><a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a> (empty)</b>
- The remote network interface addresses that this mail system
- receives mail on by way of a proxy or network address transla-
+ The remote network interface addresses that this mail system
+ receives mail on by way of a proxy or network address transla-
tion unit.
<b><a href="postconf.5.html#smtp_address_preference">smtp_address_preference</a> (any)</b>
The address type ("ipv6", "ipv4" or "any") that the Postfix SMTP
- client will try first, when a destination has IPv6 and IPv4
+ client will try first, when a destination has IPv6 and IPv4
addresses with equal MX preference.
<b><a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> (empty)</b>
- An optional numerical network address that the Postfix SMTP
+ An optional numerical network address that the Postfix SMTP
client should bind to when making an IPv4 connection.
<b><a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> (empty)</b>
- An optional numerical network address that the Postfix SMTP
+ An optional numerical network address that the Postfix SMTP
client should bind to when making an IPv6 connection.
<b><a href="postconf.5.html#smtp_helo_name">smtp_helo_name</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
- A prefix that is prepended to the process name in syslog
+ A prefix that is prepended to the process name in syslog
records, so that, for example, "smtpd" becomes "prefix/smtpd".
Available with Postfix 2.2 and earlier:
Available with Postfix 2.3 and later:
<b><a href="postconf.5.html#smtp_fallback_relay">smtp_fallback_relay</a> ($<a href="postconf.5.html#fallback_relay">fallback_relay</a>)</b>
- Optional list of relay destinations that will be used when an
- SMTP destination is not found, or when delivery fails due to a
+ Optional list of relay destinations that will be used when an
+ SMTP destination is not found, or when delivery fails due to a
non-permanent error.
Available with Postfix 3.0 and later:
<b><a href="postconf.5.html#smtp_address_verify_target">smtp_address_verify_target</a> (rcpt)</b>
- In the context of email address verification, the SMTP protocol
+ In the context of email address verification, the SMTP protocol
stage that determines whether an email address is deliverable.
Available with Postfix 3.1 and later:
Available in Postfix 3.7 and later:
<b><a href="postconf.5.html#smtp_bind_address_enforce">smtp_bind_address_enforce</a> (no)</b>
- Defer delivery when the Postfix SMTP client cannot apply the
+ Defer delivery when the Postfix SMTP client cannot apply the
<a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> or <a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> setting.
<b>SEE ALSO</b>
(FFDHE) key exchange groups supported by the Postfix SMTP client
and server.
+ Available in Postfix version 3.9 and later:
+
+ <b><a href="postconf.5.html#tls_config_file">tls_config_file</a> (default)</b>
+ Optional configuration file with baseline OpenSSL settings.
+
+ <b><a href="postconf.5.html#tls_config_name">tls_config_name</a> (empty)</b>
+ The application name passed by Postfix to OpenSSL library ini-
+ tialization functions.
+
<b>OBSOLETE STARTTLS CONTROLS</b>
- The following configuration parameters exist for compatibility with
- Postfix versions before 2.3. Support for these will be removed in a
+ The following configuration parameters exist for compatibility with
+ Postfix versions before 2.3. Support for these will be removed in a
future release.
<b><a href="postconf.5.html#smtp_use_tls">smtp_use_tls</a> (no)</b>
- Opportunistic mode: use TLS when a remote SMTP server announces
+ Opportunistic mode: use TLS when a remote SMTP server announces
STARTTLS support, otherwise send the mail in the clear.
<b><a href="postconf.5.html#smtp_enforce_tls">smtp_enforce_tls</a> (no)</b>
- Enforcement mode: require that remote SMTP servers use TLS
+ Enforcement mode: require that remote SMTP servers use TLS
encryption, and never send mail in the clear.
<b><a href="postconf.5.html#smtp_tls_enforce_peername">smtp_tls_enforce_peername</a> (yes)</b>
- With mandatory TLS encryption, require that the remote SMTP
- server hostname matches the information in the remote SMTP
+ With mandatory TLS encryption, require that the remote SMTP
+ server hostname matches the information in the remote SMTP
server certificate.
<b><a href="postconf.5.html#smtp_tls_per_site">smtp_tls_per_site</a> (empty)</b>
- Optional lookup tables with the Postfix SMTP client TLS usage
- policy by next-hop destination and by remote SMTP server host-
+ Optional lookup tables with the Postfix SMTP client TLS usage
+ policy by next-hop destination and by remote SMTP server host-
name.
<b><a href="postconf.5.html#smtp_tls_cipherlist">smtp_tls_cipherlist</a> (empty)</b>
- Obsolete Postfix < 2.3 control for the Postfix SMTP client TLS
+ Obsolete Postfix < 2.3 control for the Postfix SMTP client TLS
cipher list.
<b>RESOURCE AND RATE CONTROLS</b>
<b><a href="postconf.5.html#smtp_connect_timeout">smtp_connect_timeout</a> (30s)</b>
- The Postfix SMTP client time limit for completing a TCP connec-
+ The Postfix SMTP client time limit for completing a TCP connec-
tion, or zero (use the operating system built-in time limit).
<b><a href="postconf.5.html#smtp_helo_timeout">smtp_helo_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the HELO or EHLO
- command, and for receiving the initial remote SMTP server
+ The Postfix SMTP client time limit for sending the HELO or EHLO
+ command, and for receiving the initial remote SMTP server
response.
<b><a href="postconf.5.html#lmtp_lhlo_timeout">lmtp_lhlo_timeout</a> (300s)</b>
mand, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_mail_timeout">smtp_mail_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the MAIL FROM
+ The Postfix SMTP client time limit for sending the MAIL FROM
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_rcpt_timeout">smtp_rcpt_timeout</a> (300s)</b>
- The Postfix SMTP client time limit for sending the SMTP RCPT TO
+ The Postfix SMTP client time limit for sending the SMTP RCPT TO
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_data_init_timeout">smtp_data_init_timeout</a> (120s)</b>
- The Postfix SMTP client time limit for sending the SMTP DATA
+ The Postfix SMTP client time limit for sending the SMTP DATA
command, and for receiving the remote SMTP server response.
<b><a href="postconf.5.html#smtp_data_xfer_timeout">smtp_data_xfer_timeout</a> (180s)</b>
- The Postfix SMTP client time limit for sending the SMTP message
+ The Postfix SMTP client time limit for sending the SMTP message
content.
<b><a href="postconf.5.html#smtp_data_done_timeout">smtp_data_done_timeout</a> (600s)</b>
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtp_mx_address_limit">smtp_mx_address_limit</a> (5)</b>
- The maximal number of MX (mail exchanger) IP addresses that can
- result from Postfix SMTP client mail exchanger lookups, or zero
+ The maximal number of MX (mail exchanger) IP addresses that can
+ result from Postfix SMTP client mail exchanger lookups, or zero
(no limit).
<b><a href="postconf.5.html#smtp_mx_session_limit">smtp_mx_session_limit</a> (2)</b>
- The maximal number of SMTP sessions per delivery request before
- the Postfix SMTP client gives up or delivers to a fall-back
+ The maximal number of SMTP sessions per delivery request before
+ the Postfix SMTP client gives up or delivers to a fall-back
<a href="postconf.5.html#relayhost">relay host</a>, or zero (no limit).
<b><a href="postconf.5.html#smtp_rset_timeout">smtp_rset_timeout</a> (20s)</b>
Available in Postfix version 2.2 and earlier:
<b><a href="postconf.5.html#lmtp_cache_connection">lmtp_cache_connection</a> (yes)</b>
- Keep
Postfix LMTP client connections open for up to $<a href="postconf.5.html#max_idle">max_idle</a>
+ Keep
Postfix LMTP client connections open for up to $<a href="postconf.5.html#max_idle">max_idle</a>
seconds.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtp_connection_cache_destinations">smtp_connection_cache_destinations</a> (empty)</b>
- Permanently enable SMTP connection caching for the specified
+ Permanently enable SMTP connection caching for the specified
destinations.
<b><a href="postconf.5.html#smtp_connection_cache_on_demand">smtp_connection_cache_on_demand</a> (yes)</b>
- Temporarily enable SMTP connection caching while a destination
+ Temporarily enable SMTP connection caching while a destination
has a high volume of mail in the <a href="QSHAPE_README.html#active_queue">active queue</a>.
<b><a href="postconf.5.html#smtp_connection_reuse_time_limit">smtp_connection_reuse_time_limit</a> (300s)</b>
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#connection_cache_protocol_timeout">connection_cache_protocol_timeout</a> (5s)</b>
- Time limit for connection cache connect, send or receive opera-
+ Time limit for connection cache connect, send or receive opera-
tions.
Available in Postfix version 2.9 - 3.6:
<b><a href="postconf.5.html#smtp_per_record_deadline">smtp_per_record_deadline</a> (no)</b>
- Change the behavior of the smtp_*_timeout time limits, from a
- time limit per read or write system call, to a time limit to
- send or receive a complete record (an SMTP command line, SMTP
- response line, SMTP message content line, or TLS protocol mes-
+ Change the behavior of the smtp_*_timeout time limits, from a
+ time limit per read or write system call, to a time limit to
+ send or receive a complete record (an SMTP command line, SMTP
+ response line, SMTP message content line, or TLS protocol mes-
sage).
Available in Postfix version 2.11 and later:
<b><a href="postconf.5.html#smtp_connection_reuse_count_limit">smtp_connection_reuse_count_limit</a> (0)</b>
- When SMTP connection caching is enabled, the number of times
- that an SMTP session may be reused before it is closed, or zero
+ When SMTP connection caching is enabled, the number of times
+ that an SMTP session may be reused before it is closed, or zero
(no limit).
Available in Postfix version 3.4 and later:
Available in Postfix version 3.7 and later:
<b><a href="postconf.5.html#smtp_per_request_deadline">smtp_per_request_deadline</a> (no)</b>
- Change the behavior of the smtp_*_timeout time limits, from a
- time limit per plaintext or TLS read or write call, to a com-
- bined time limit for sending a complete SMTP request and for
+ Change the behavior of the smtp_*_timeout time limits, from a
+ time limit per plaintext or TLS read or write call, to a com-
+ bined time limit for sending a complete SMTP request and for
receiving a complete SMTP response.
<b><a href="postconf.5.html#smtp_min_data_rate">smtp_min_data_rate</a> (500)</b>
- The minimum plaintext data transfer rate in bytes/second for
+ The minimum plaintext data transfer rate in bytes/second for
DATA requests, when deadlines are enabled with
<a href="postconf.5.html#smtp_per_request_deadline">smtp_per_request_deadline</a>.
<b><a href="postconf.5.html#transport_destination_concurrency_limit">transport_destination_concurrency_limit</a> ($<a href="postconf.5.html#default_destination_concurrency_limit">default_destination_concur</a>-</b>
<b><a href="postconf.5.html#default_destination_concurrency_limit">rency_limit</a>)</b>
- A
transport-specific override for the <a href="postconf.5.html#default_destination_concurrency_limit">default_destination_con</a>-
+ A
transport-specific override for the <a href="postconf.5.html#default_destination_concurrency_limit">default_destination_con</a>-
<a href="postconf.5.html#default_destination_concurrency_limit">currency_limit</a> parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
name of the message delivery transport.
<b><a href="postconf.5.html#transport_destination_recipient_limit">transport_destination_recipient_limit</a> ($<a href="postconf.5.html#default_destination_recipient_limit">default_destination_recipi</a>-</b>
<b><a href="postconf.5.html#default_destination_recipient_limit">ent_limit</a>)</b>
A transport-specific override for the <a href="postconf.5.html#default_destination_recipient_limit">default_destination_recip</a>-
- <a href="postconf.5.html#default_destination_recipient_limit">ient_limit</a>
parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
+ <a href="postconf.5.html#default_destination_recipient_limit">ient_limit</a>
parameter value, where <i>transport</i> is the <a href="master.5.html">master.cf</a>
name of the message delivery transport.
<b>SMTPUTF8 CONTROLS</b>
Preliminary SMTPUTF8 support is introduced with Postfix 3.0.
<b><a href="postconf.5.html#smtputf8_enable">smtputf8_enable</a> (yes)</b>
- Enable preliminary SMTPUTF8 support for the protocols described
+ Enable preliminary SMTPUTF8 support for the protocols described
in <a href="https://tools.ietf.org/html/rfc6531">RFC 6531</a>, <a href="https://tools.ietf.org/html/rfc6532">RFC 6532</a>, and <a href="https://tools.ietf.org/html/rfc6533">RFC 6533</a>.
<b><a href="postconf.5.html#smtputf8_autodetect_classes">smtputf8_autodetect_classes</a> (sendmail, verify)</b>
- Detect that a message requires SMTPUTF8 support for the speci-
+ Detect that a message requires SMTPUTF8 support for the speci-
fied mail origin classes.
Available in Postfix version 3.2 and later:
<b><a href="postconf.5.html#enable_idna2003_compatibility">enable_idna2003_compatibility</a> (no)</b>
- Enable 'transitional' compatibility between IDNA2003 and
- IDNA2008, when converting UTF-8 domain names to/from the ASCII
+ Enable 'transitional' compatibility between IDNA2003 and
+ IDNA2008, when converting UTF-8 domain names to/from the ASCII
form that is used for DNS lookups.
<b>TROUBLE SHOOTING CONTROLS</b>
<b><a href="postconf.5.html#debug_peer_level">debug_peer_level</a> (2)</b>
- The increment in verbose logging level when a nexthop destina-
- tion, remote client or server name or network address matches a
+ The increment in verbose logging level when a nexthop destina-
+ tion, remote client or server name or network address matches a
pattern given with the <a href="postconf.5.html#debug_peer_list">debug_peer_list</a> parameter.
<b><a href="postconf.5.html#debug_peer_list">debug_peer_list</a> (empty)</b>
- Optional list of nexthop destination, remote client or server
- name or network address patterns that, if matched, cause the
- verbose logging level to increase by the amount specified in
+ Optional list of nexthop destination, remote client or server
+ name or network address patterns that, if matched, cause the
+ verbose logging level to increase by the amount specified in
$<a href="postconf.5.html#debug_peer_level">debug_peer_level</a>.
<b><a href="postconf.5.html#error_notice_recipient">error_notice_recipient</a> (postmaster)</b>
- The recipient of postmaster notifications about mail delivery
+ The recipient of postmaster notifications about mail delivery
problems that are caused by policy, resource, software or proto-
col errors.
<b><a href="postconf.5.html#internal_mail_filter_classes">internal_mail_filter_classes</a> (empty)</b>
- What categories of Postfix-generated mail are subject to
- before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
+ What categories of Postfix-generated mail are subject to
+ before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
<a href="postconf.5.html#header_checks">header_checks</a> and <a href="postconf.5.html#body_checks">body_checks</a>.
<b><a href="postconf.5.html#notify_classes">notify_classes</a> (resource, software)</b>
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#best_mx_transport">best_mx_transport</a> (empty)</b>
- Where the Postfix SMTP client should deliver mail when it
+ Where the Postfix SMTP client should deliver mail when it
detects a "mail loops back to myself" error condition.
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
- The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
+ The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
figuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
- How much time a Postfix daemon process may take to handle a
+ How much time a Postfix daemon process may take to handle a
request before it is terminated by a built-in watchdog timer.
<b><a href="postconf.5.html#delay_logging_resolution_limit">delay_logging_resolution_limit</a> (2)</b>
- The maximal number of digits after the decimal point when log-
+ The maximal number of digits after the decimal point when log-
ging sub-second delay values.
<b><a href="postconf.5.html#disable_dns_lookups">disable_dns_lookups</a> (no)</b>
Disable DNS lookups in the Postfix SMTP and LMTP clients.
<b><a href="postconf.5.html#inet_interfaces">inet_interfaces</a> (all)</b>
- The local network interface addresses that this mail system
+ The local network interface addresses that this mail system
receives mail on.
<b><a href="postconf.5.html#inet_protocols">inet_protocols</a> (see 'postconf -d output')</b>
- The Internet protocols Postfix will attempt to use when making
+ The Internet protocols Postfix will attempt to use when making
or accepting connections.
<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
- The time limit for sending or receiving information over an
+ The time limit for sending or receiving information over an
internal communication channel.
<b><a href="postconf.5.html#lmtp_assume_final">lmtp_assume_final</a> (no)</b>
- When a remote LMTP server announces no DSN support, assume that
- the server performs final delivery, and send "delivered" deliv-
+ When a remote LMTP server announces no DSN support, assume that
+ the server performs final delivery, and send "delivered" deliv-
ery status notifications instead of "relayed".
<b><a href="postconf.5.html#lmtp_tcp_port">lmtp_tcp_port</a> (24)</b>
The default TCP port that the Postfix LMTP client connects to.
<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
- The maximum amount of time that an idle Postfix daemon process
+ The maximum amount of time that an idle Postfix daemon process
waits for an incoming connection before terminating voluntarily.
<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
The process name of a Postfix command or daemon process.
<b><a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a> (empty)</b>
- The remote network interface addresses that this mail system
- receives mail on by way of a proxy or network address transla-
+ The remote network interface addresses that this mail system
+ receives mail on by way of a proxy or network address transla-
tion unit.
<b><a href="postconf.5.html#smtp_address_preference">smtp_address_preference</a> (any)</b>
The address type ("ipv6", "ipv4" or "any") that the Postfix SMTP
- client will try first, when a destination has IPv6 and IPv4
+ client will try first, when a destination has IPv6 and IPv4
addresses with equal MX preference.
<b><a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> (empty)</b>
- An optional numerical network address that the Postfix SMTP
+ An optional numerical network address that the Postfix SMTP
client should bind to when making an IPv4 connection.
<b><a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> (empty)</b>
- An optional numerical network address that the Postfix SMTP
+ An optional numerical network address that the Postfix SMTP
client should bind to when making an IPv6 connection.
<b><a href="postconf.5.html#smtp_helo_name">smtp_helo_name</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
- A prefix that is prepended to the process name in syslog
+ A prefix that is prepended to the process name in syslog
records, so that, for example, "smtpd" becomes "prefix/smtpd".
Available with Postfix 2.2 and earlier:
Available with Postfix 2.3 and later:
<b><a href="postconf.5.html#smtp_fallback_relay">smtp_fallback_relay</a> ($<a href="postconf.5.html#fallback_relay">fallback_relay</a>)</b>
- Optional list of relay destinations that will be used when an
- SMTP destination is not found, or when delivery fails due to a
+ Optional list of relay destinations that will be used when an
+ SMTP destination is not found, or when delivery fails due to a
non-permanent error.
Available with Postfix 3.0 and later:
<b><a href="postconf.5.html#smtp_address_verify_target">smtp_address_verify_target</a> (rcpt)</b>
- In the context of email address verification, the SMTP protocol
+ In the context of email address verification, the SMTP protocol
stage that determines whether an email address is deliverable.
Available with Postfix 3.1 and later:
Available in Postfix 3.7 and later:
<b><a href="postconf.5.html#smtp_bind_address_enforce">smtp_bind_address_enforce</a> (no)</b>
- Defer delivery when the Postfix SMTP client cannot apply the
+ Defer delivery when the Postfix SMTP client cannot apply the
<a href="postconf.5.html#smtp_bind_address">smtp_bind_address</a> or <a href="postconf.5.html#smtp_bind_address6">smtp_bind_address6</a> setting.
<b>SEE ALSO</b>
(FFDHE) key exchange groups supported by the Postfix SMTP client
and server.
+ Available in Postfix version 3.9 and later:
+
+ <b><a href="postconf.5.html#tls_config_file">tls_config_file</a> (default)</b>
+ Optional configuration file with baseline OpenSSL settings.
+
+ <b><a href="postconf.5.html#tls_config_name">tls_config_name</a> (empty)</b>
+ The application name passed by Postfix to OpenSSL library ini-
+ tialization functions.
+
<b>OBSOLETE STARTTLS CONTROLS</b>
- The following configuration parameters exist for compatibility with
- Postfix versions before 2.3. Support for these will be removed in a
+ The following configuration parameters exist for compatibility with
+ Postfix versions before 2.3. Support for these will be removed in a
future release.
<b><a href="postconf.5.html#smtpd_use_tls">smtpd_use_tls</a> (no)</b>
- Opportunistic TLS: announce STARTTLS support to remote SMTP
+ Opportunistic TLS: announce STARTTLS support to remote SMTP
clients, but do not require that clients use TLS encryption.
<b><a href="postconf.5.html#smtpd_enforce_tls">smtpd_enforce_tls</a> (no)</b>
and require that clients use TLS encryption.
<b><a href="postconf.5.html#smtpd_tls_cipherlist">smtpd_tls_cipherlist</a> (empty)</b>
- Obsolete Postfix < 2.3 control for the Postfix SMTP server TLS
+ Obsolete Postfix < 2.3 control for the Postfix SMTP server TLS
cipher list.
<b>SMTPUTF8 CONTROLS</b>
Preliminary SMTPUTF8 support is introduced with Postfix 3.0.
<b><a href="postconf.5.html#smtputf8_enable">smtputf8_enable</a> (yes)</b>
- Enable preliminary SMTPUTF8 support for the protocols described
+ Enable preliminary SMTPUTF8 support for the protocols described
in <a href="https://tools.ietf.org/html/rfc6531">RFC 6531</a>, <a href="https://tools.ietf.org/html/rfc6532">RFC 6532</a>, and <a href="https://tools.ietf.org/html/rfc6533">RFC 6533</a>.
<b><a href="postconf.5.html#strict_smtputf8">strict_smtputf8</a> (no)</b>
Enable stricter enforcement of the SMTPUTF8 protocol.
<b><a href="postconf.5.html#smtputf8_autodetect_classes">smtputf8_autodetect_classes</a> (sendmail, verify)</b>
- Detect that a message requires SMTPUTF8 support for the speci-
+ Detect that a message requires SMTPUTF8 support for the speci-
fied mail origin classes.
Available in Postfix version 3.2 and later:
<b><a href="postconf.5.html#enable_idna2003_compatibility">enable_idna2003_compatibility</a> (no)</b>
- Enable 'transitional' compatibility between IDNA2003 and
- IDNA2008, when converting UTF-8 domain names to/from the ASCII
+ Enable 'transitional' compatibility between IDNA2003 and
+ IDNA2008, when converting UTF-8 domain names to/from the ASCII
form that is used for DNS lookups.
<b>VERP SUPPORT CONTROLS</b>
- With VERP style delivery, each recipient of a message receives a cus-
- tomized copy of the message with his/her own recipient address encoded
+ With VERP style delivery, each recipient of a message receives a cus-
+ tomized copy of the message with his/her own recipient address encoded
in the envelope sender address. The <a href="VERP_README.html">VERP_README</a> file describes config-
- uration and operation details of Postfix support for variable envelope
- return path addresses. VERP style delivery is requested with the SMTP
- XVERP command or with the "sendmail -V" command-line option and is
+ uration and operation details of Postfix support for variable envelope
+ return path addresses. VERP style delivery is requested with the SMTP
+ XVERP command or with the "sendmail -V" command-line option and is
available in Postfix version 1.1 and later.
<b><a href="postconf.5.html#default_verp_delimiters">default_verp_delimiters</a> (+=)</b>
The two default VERP delimiter characters.
<b><a href="postconf.5.html#verp_delimiter_filter">verp_delimiter_filter</a> (-=+)</b>
- The characters Postfix accepts as VERP delimiter characters on
+ The characters Postfix accepts as VERP delimiter characters on
the Postfix <a href="sendmail.1.html"><b>sendmail</b>(1)</a> command line and in SMTP commands.
Available in Postfix version 1.1 and 2.0:
<b><a href="postconf.5.html#authorized_verp_clients">authorized_verp_clients</a> ($<a href="postconf.5.html#mynetworks">mynetworks</a>)</b>
- What remote SMTP clients are allowed to specify the XVERP com-
+ What remote SMTP clients are allowed to specify the XVERP com-
mand.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_authorized_verp_clients">smtpd_authorized_verp_clients</a> ($<a href="postconf.5.html#authorized_verp_clients">authorized_verp_clients</a>)</b>
- What remote SMTP clients are allowed to specify the XVERP com-
+ What remote SMTP clients are allowed to specify the XVERP com-
mand.
<b>TROUBLE SHOOTING CONTROLS</b>
- The <a href="DEBUG_README.html">DEBUG_README</a> document describes how to debug parts of the Postfix
- mail system. The methods vary from making the software log a lot of
+ The <a href="DEBUG_README.html">DEBUG_README</a> document describes how to debug parts of the Postfix
+ mail system. The methods vary from making the software log a lot of
detail, to running some daemon processes under control of a call tracer
or debugger.
<b><a href="postconf.5.html#debug_peer_level">debug_peer_level</a> (2)</b>
- The increment in verbose logging level when a nexthop destina-
- tion, remote client or server name or network address matches a
+ The increment in verbose logging level when a nexthop destina-
+ tion, remote client or server name or network address matches a
pattern given with the <a href="postconf.5.html#debug_peer_list">debug_peer_list</a> parameter.
<b><a href="postconf.5.html#debug_peer_list">debug_peer_list</a> (empty)</b>
- Optional list of nexthop destination, remote client or server
- name or network address patterns that, if matched, cause the
- verbose logging level to increase by the amount specified in
+ Optional list of nexthop destination, remote client or server
+ name or network address patterns that, if matched, cause the
+ verbose logging level to increase by the amount specified in
$<a href="postconf.5.html#debug_peer_level">debug_peer_level</a>.
<b><a href="postconf.5.html#error_notice_recipient">error_notice_recipient</a> (postmaster)</b>
- The recipient of postmaster notifications about mail delivery
+ The recipient of postmaster notifications about mail delivery
problems that are caused by policy, resource, software or proto-
col errors.
<b><a href="postconf.5.html#internal_mail_filter_classes">internal_mail_filter_classes</a> (empty)</b>
- What categories of Postfix-generated mail are subject to
- before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
+ What categories of Postfix-generated mail are subject to
+ before-queue
content inspection by <a href="postconf.5.html#non_smtpd_milters">non_smtpd_milters</a>,
<a href="postconf.5.html#header_checks">header_checks</a> and <a href="postconf.5.html#body_checks">body_checks</a>.
<b><a href="postconf.5.html#notify_classes">notify_classes</a> (resource, software)</b>
The list of error classes that are reported to the postmaster.
<b><a href="postconf.5.html#smtpd_reject_footer">smtpd_reject_footer</a> (empty)</b>
- Optional information that is appended after each Postfix SMTP
+ Optional information that is appended after each Postfix SMTP
server 4XX or 5XX response.
<b><a href="postconf.5.html#soft_bounce">soft_bounce</a> (no)</b>
- Safety net to keep mail queued that would otherwise be returned
+ Safety net to keep mail queued that would otherwise be returned
to the sender.
Available in Postfix version 2.1 and later:
Available in Postfix version 2.10 and later:
<b><a href="postconf.5.html#smtpd_log_access_permit_actions">smtpd_log_access_permit_actions</a> (empty)</b>
- Enable logging of the named "permit" actions in SMTP server
- access lists (by default, the SMTP server logs "reject" actions
+ Enable logging of the named "permit" actions in SMTP server
+ access lists (by default, the SMTP server logs "reject" actions
but not "permit" actions).
<b>KNOWN VERSUS UNKNOWN RECIPIENT CONTROLS</b>
- As of Postfix version 2.0, the SMTP server rejects mail for unknown
+ As of Postfix version 2.0, the SMTP server rejects mail for unknown
recipients. This prevents the mail queue from clogging up with undeliv-
- erable MAILER-DAEMON messages. Additional information on this topic is
+ erable MAILER-DAEMON messages. Additional information on this topic is
in the <a href="LOCAL_RECIPIENT_README.html">LOCAL_RECIPIENT_README</a> and <a href="ADDRESS_CLASS_README.html">ADDRESS_CLASS_README</a> documents.
<b><a href="postconf.5.html#show_user_unknown_table_name">show_user_unknown_table_name</a> (yes)</b>
- Display the name of the recipient table in the "User unknown"
+ Display the name of the recipient table in the "User unknown"
responses.
<b><a href="postconf.5.html#canonical_maps">canonical_maps</a> (empty)</b>
- Optional address mapping lookup tables for message headers and
+ Optional address mapping lookup tables for message headers and
envelopes.
<b><a href="postconf.5.html#recipient_canonical_maps">recipient_canonical_maps</a> (empty)</b>
- Optional address mapping lookup tables for envelope and header
+ Optional address mapping lookup tables for envelope and header
recipient addresses.
<b><a href="postconf.5.html#sender_canonical_maps">sender_canonical_maps</a> (empty)</b>
- Optional address mapping lookup tables for envelope and header
+ Optional address mapping lookup tables for envelope and header
sender addresses.
Parameters concerning known/unknown local recipients:
<b><a href="postconf.5.html#mydestination">mydestination</a> ($<a href="postconf.5.html#myhostname">myhostname</a>, localhost.$<a href="postconf.5.html#mydomain">mydomain</a>, localhost)</b>
- The
list of domains that are delivered via the $<a href="postconf.5.html#local_transport">local_transport</a>
+ The
list of domains that are delivered via the $<a href="postconf.5.html#local_transport">local_transport</a>
mail delivery transport.
<b><a href="postconf.5.html#inet_interfaces">inet_interfaces</a> (all)</b>
- The local network interface addresses that this mail system
+ The local network interface addresses that this mail system
receives mail on.
<b><a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a> (empty)</b>
- The remote network interface addresses that this mail system
- receives mail on by way of a proxy or network address transla-
+ The remote network interface addresses that this mail system
+ receives mail on by way of a proxy or network address transla-
tion unit.
<b><a href="postconf.5.html#inet_protocols">inet_protocols</a> (see 'postconf -d output')</b>
- The Internet protocols Postfix will attempt to use when making
+ The Internet protocols Postfix will attempt to use when making
or accepting connections.
<b><a href="postconf.5.html#local_recipient_maps">local_recipient_maps</a> (<a href="proxymap.8.html">proxy</a>:unix:passwd.byname $<a href="postconf.5.html#alias_maps">alias_maps</a>)</b>
Lookup tables with all names or addresses of local recipients: a
- recipient
address is local when its domain matches $<a href="postconf.5.html#mydestination">mydestina</a>-
+ recipient
address is local when its domain matches $<a href="postconf.5.html#mydestination">mydestina</a>-
<a href="postconf.5.html#mydestination">tion</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a> or $<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>.
<b><a href="postconf.5.html#unknown_local_recipient_reject_code">unknown_local_recipient_reject_code</a> (550)</b>
The numerical Postfix SMTP server response code when a recipient
- address is local, and $<a href="postconf.5.html#local_recipient_maps">local_recipient_maps</a> specifies a list of
+ address is local, and $<a href="postconf.5.html#local_recipient_maps">local_recipient_maps</a> specifies a list of
lookup tables that does not match the recipient.
Parameters concerning known/unknown recipients of relay destinations:
<b><a href="postconf.5.html#relay_domains">relay_domains</a> (Postfix</b> ><b>= 3.0: empty, Postfix</b> < <b>3.0: $<a href="postconf.5.html#mydestination">mydestination</a>)</b>
- What destination domains (and subdomains thereof) this system
+ What destination domains (and subdomains thereof) this system
will relay mail to.
<b><a href="postconf.5.html#relay_recipient_maps">relay_recipient_maps</a> (empty)</b>
- Optional lookup tables with all valid addresses in the domains
+ Optional lookup tables with all valid addresses in the domains
that match $<a href="postconf.5.html#relay_domains">relay_domains</a>.
<b><a href="postconf.5.html#unknown_relay_recipient_reject_code">unknown_relay_recipient_reject_code</a> (550)</b>
- The numerical Postfix SMTP server reply code when a recipient
- address matches $<a href="postconf.5.html#relay_domains">relay_domains</a>, and <a href="postconf.5.html#relay_recipient_maps">relay_recipient_maps</a> speci-
- fies a list of lookup tables that does not match the recipient
+ The numerical Postfix SMTP server reply code when a recipient
+ address matches $<a href="postconf.5.html#relay_domains">relay_domains</a>, and <a href="postconf.5.html#relay_recipient_maps">relay_recipient_maps</a> speci-
+ fies a list of lookup tables that does not match the recipient
address.
- Parameters concerning known/unknown recipients in virtual alias
+ Parameters concerning known/unknown recipients in virtual alias
domains:
<b><a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a> ($<a href="postconf.5.html#virtual_alias_maps">virtual_alias_maps</a>)</b>
- Postfix is the final destination for the specified list of vir-
+ Postfix is the final destination for the specified list of vir-
tual 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 with aliases that apply to all recipi-
- ents:
<a href="local.8.html"><b>local</b>(8)</a>, virtual, and remote; this is unlike <a href="postconf.5.html#alias_maps">alias_maps</a>
+ Optional lookup tables with aliases that apply to all recipi-
+ ents:
<a href="local.8.html"><b>local</b>(8)</a>, virtual, and remote; this is unlike <a href="postconf.5.html#alias_maps">alias_maps</a>
that apply only to <a href="local.8.html"><b>local</b>(8)</a> recipients.
<b><a href="postconf.5.html#unknown_virtual_alias_reject_code">unknown_virtual_alias_reject_code</a> (550)</b>
- The Postfix SMTP server reply code when a recipient address
- matches $<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, and $<a href="postconf.5.html#virtual_alias_maps">virtual_alias_maps</a> speci-
- fies a list of lookup tables that does not match the recipient
+ The Postfix SMTP server reply code when a recipient address
+ matches $<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, and $<a href="postconf.5.html#virtual_alias_maps">virtual_alias_maps</a> speci-
+ fies a list of lookup tables that does not match the recipient
address.
Parameters concerning known/unknown recipients in virtual mailbox
domains:
<b><a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a> ($<a href="postconf.5.html#virtual_mailbox_maps">virtual_mailbox_maps</a>)</b>
- Postfix is the final destination for the specified list of
- domains; mail is delivered via the $<a href="postconf.5.html#virtual_transport">virtual_transport</a> mail
+ Postfix is the final destination for the specified list of
+ domains; mail is delivered via the $<a href="postconf.5.html#virtual_transport">virtual_transport</a> mail
delivery transport.
<b><a href="postconf.5.html#virtual_mailbox_maps">virtual_mailbox_maps</a> (empty)</b>
- Optional lookup tables with all valid addresses in the domains
+ Optional lookup tables with all valid addresses in the domains
that match $<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>.
<b><a href="postconf.5.html#unknown_virtual_mailbox_reject_code">unknown_virtual_mailbox_reject_code</a> (550)</b>
- The Postfix SMTP server reply code when a recipient address
- matches
$<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>, and $<a href="postconf.5.html#virtual_mailbox_maps">virtual_mailbox_maps</a>
+ The Postfix SMTP server reply code when a recipient address
+ matches
$<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a>, and $<a href="postconf.5.html#virtual_mailbox_maps">virtual_mailbox_maps</a>
specifies a list of lookup tables that does not match the recip-
ient address.
control client request rates.
<b><a href="postconf.5.html#line_length_limit">line_length_limit</a> (2048)</b>
- Upon input, long lines are chopped up into pieces of at most
+ Upon input, long lines are chopped up into pieces of at most
this length; upon delivery, long lines are reconstructed.
<b><a href="postconf.5.html#queue_minfree">queue_minfree</a> (0)</b>
tem that is needed to receive mail.
<b><a href="postconf.5.html#message_size_limit">message_size_limit</a> (10240000)</b>
- The maximal size in bytes of a message, including envelope
+ The maximal size in bytes of a message, including envelope
information.
<b><a href="postconf.5.html#smtpd_recipient_limit">smtpd_recipient_limit</a> (1000)</b>
- The maximal number of recipients that the Postfix SMTP server
+ The maximal number of recipients that the Postfix SMTP server
accepts per message delivery request.
<b><a href="postconf.5.html#smtpd_timeout">smtpd_timeout</a> (normal: 300s, overload: 10s)</b>
- When the Postfix SMTP server wants to send an SMTP server
- response, how long the Postfix SMTP server will wait for an
- underlying network write operation to complete; and when the
- Postfix SMTP server Postfix wants to receive an SMTP client
- request, how long the Postfix SMTP server will wait for an
+ When the Postfix SMTP server wants to send an SMTP server
+ response, how long the Postfix SMTP server will wait for an
+ underlying network write operation to complete; and when the
+ Postfix SMTP server Postfix wants to receive an SMTP client
+ request, how long the Postfix SMTP server will wait for an
underlying network read operation to complete.
<b><a href="postconf.5.html#smtpd_history_flush_threshold">smtpd_history_flush_threshold</a> (100)</b>
- The maximal number of lines in the Postfix SMTP server command
- history before it is flushed upon receipt of EHLO, RSET, or end
+ The maximal number of lines in the Postfix SMTP server command
+ history before it is flushed upon receipt of EHLO, RSET, or end
of DATA.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#smtpd_peername_lookup">smtpd_peername_lookup</a> (yes)</b>
- Attempt to look up the remote SMTP client hostname, and verify
+ Attempt to look up the remote SMTP client hostname, and verify
that the name matches the client IP address.
The per SMTP client connection count and request rate limits are imple-
- mented in co-operation with the <a href="anvil.8.html"><b>anvil</b>(8)</a> service, and are available in
+ mented in co-operation with the <a href="anvil.8.html"><b>anvil</b>(8)</a> service, and are available in
Postfix version 2.2 and later.
<b><a href="postconf.5.html#smtpd_client_connection_count_limit">smtpd_client_connection_count_limit</a> (50)</b>
- How many simultaneous connections any client is allowed to make
+ How many simultaneous connections any client is allowed to make
to this service.
<b><a href="postconf.5.html#smtpd_client_connection_rate_limit">smtpd_client_connection_rate_limit</a> (0)</b>
- The maximal number of connection attempts any client is allowed
+ The maximal number of connection attempts any client is allowed
to make to this service per time unit.
<b><a href="postconf.5.html#smtpd_client_message_rate_limit">smtpd_client_message_rate_limit</a> (0)</b>
- The maximal number of message delivery requests that any client
- is allowed to make to this service per time unit, regardless of
+ The maximal number of message delivery requests that any client
+ is allowed to make to this service per time unit, regardless of
whether or not Postfix actually accepts those messages.
<b><a href="postconf.5.html#smtpd_client_recipient_rate_limit">smtpd_client_recipient_rate_limit</a> (0)</b>
- The maximal number of recipient addresses that any client is
- allowed to send to this service per time unit, regardless of
+ The maximal number of recipient addresses that any client is
+ allowed to send to this service per time unit, regardless of
whether or not Postfix actually accepts those recipients.
<b><a href="postconf.5.html#smtpd_client_event_limit_exceptions">smtpd_client_event_limit_exceptions</a> ($<a href="postconf.5.html#mynetworks">mynetworks</a>)</b>
- Clients that are excluded from smtpd_client_*_count/rate_limit
+ Clients that are excluded from smtpd_client_*_count/rate_limit
restrictions.
Available in Postfix version 2.3 and later:
<b><a href="postconf.5.html#smtpd_client_new_tls_session_rate_limit">smtpd_client_new_tls_session_rate_limit</a> (0)</b>
- The maximal number of new (i.e., uncached) TLS sessions that a
+ The maximal number of new (i.e., uncached) TLS sessions that a
remote SMTP client is allowed to negotiate with this service per
time unit.
<b><a href="postconf.5.html#smtpd_per_record_deadline">smtpd_per_record_deadline</a> (normal: no, overload: yes)</b>
Change the behavior of the <a href="postconf.5.html#smtpd_timeout">smtpd_timeout</a> and <a href="postconf.5.html#smtpd_starttls_timeout">smtpd_start</a>-
- <a href="postconf.5.html#smtpd_starttls_timeout">tls_timeout</a> time limits, from a time limit per read or write
- system call, to a time limit to send or receive a complete
- record (an SMTP command line, SMTP response line, SMTP message
+ <a href="postconf.5.html#smtpd_starttls_timeout">tls_timeout</a> time limits, from a time limit per read or write
+ system call, to a time limit to send or receive a complete
+ record (an SMTP command line, SMTP response line, SMTP message
content line, or TLS protocol message).
Available in Postfix version 3.1 and later:
<b><a href="postconf.5.html#smtpd_client_auth_rate_limit">smtpd_client_auth_rate_limit</a> (0)</b>
- The maximal number of AUTH commands that any client is allowed
- to send to this service per time unit, regardless of whether or
+ The maximal number of AUTH commands that any client is allowed
+ to send to this service per time unit, regardless of whether or
not Postfix actually accepts those commands.
Available in Postfix version 3.7 and later:
<b><a href="postconf.5.html#smtpd_per_request_deadline">smtpd_per_request_deadline</a> (normal: no, overload: yes)</b>
Change the behavior of the <a href="postconf.5.html#smtpd_timeout">smtpd_timeout</a> and <a href="postconf.5.html#smtpd_starttls_timeout">smtpd_start</a>-
- <a href="postconf.5.html#smtpd_starttls_timeout">tls_timeout</a> time limits, from a time limit per plaintext or TLS
- read or write call, to a combined time limit for receiving a
- complete SMTP request and for sending a complete SMTP response.
+ <a href="postconf.5.html#smtpd_starttls_timeout">tls_timeout</a> time limits, from a time limit per plaintext or TLS
+ read or write call, to a combined time limit for receiving a
+ complete SMTP request and for sending a complete SMTP response.
<b><a href="postconf.5.html#smtpd_min_data_rate">smtpd_min_data_rate</a> (500)</b>
- The minimum plaintext data transfer rate in bytes/second for
- DATA and BDAT requests, when deadlines are enabled with
+ The minimum plaintext data transfer rate in bytes/second for
+ DATA and BDAT requests, when deadlines are enabled with
<a href="postconf.5.html#smtpd_per_request_deadline">smtpd_per_request_deadline</a>.
<b><a href="postconf.5.html#header_from_format">header_from_format</a> (standard)</b>
Available in Postfix version 3.8 and later:
<b><a href="postconf.5.html#smtpd_client_ipv4_prefix_length">smtpd_client_ipv4_prefix_length</a> (32)</b>
- Aggregate smtpd_client_*_count and smtpd_client_*_rate statis-
+ Aggregate smtpd_client_*_count and smtpd_client_*_rate statis-
tics by IPv4 network blocks with the specified network prefix.
<b><a href="postconf.5.html#smtpd_client_ipv6_prefix_length">smtpd_client_ipv6_prefix_length</a> (84)</b>
- Aggregate smtpd_client_*_count and smtpd_client_*_rate statis-
+ Aggregate smtpd_client_*_count and smtpd_client_*_rate statis-
tics by IPv6 network blocks with the specified network prefix.
<b>TARPIT CONTROLS</b>
- When a remote SMTP client makes errors, the Postfix SMTP server can
- insert delays before responding. This can help to slow down run-away
- software. The behavior is controlled by an error counter that counts
+ When a remote SMTP client makes errors, the Postfix SMTP server can
+ insert delays before responding. This can help to slow down run-away
+ software. The behavior is controlled by an error counter that counts
the number of errors within an SMTP session that a client makes without
delivering mail.
<b><a href="postconf.5.html#smtpd_error_sleep_time">smtpd_error_sleep_time</a> (1s)</b>
- With Postfix version 2.1 and later: the SMTP server response
- delay
after a client has made more than $<a href="postconf.5.html#smtpd_soft_error_limit">smtpd_soft_error_limit</a>
- errors, and fewer than $<a href="postconf.5.html#smtpd_hard_error_limit">smtpd_hard_error_limit</a> errors, without
+ With Postfix version 2.1 and later: the SMTP server response
+ delay
after a client has made more than $<a href="postconf.5.html#smtpd_soft_error_limit">smtpd_soft_error_limit</a>
+ errors, and fewer than $<a href="postconf.5.html#smtpd_hard_error_limit">smtpd_hard_error_limit</a> errors, without
delivering mail.
<b><a href="postconf.5.html#smtpd_soft_error_limit">smtpd_soft_error_limit</a> (10)</b>
- The number of errors a remote SMTP client is allowed to make
- without delivering mail before the Postfix SMTP server slows
+ The number of errors a remote SMTP client is allowed to make
+ without delivering mail before the Postfix SMTP server slows
down all its responses.
<b><a href="postconf.5.html#smtpd_hard_error_limit">smtpd_hard_error_limit</a> (normal: 20, overload: 1)</b>
- The maximal number of errors a remote SMTP client is allowed to
+ The maximal number of errors a remote SMTP client is allowed to
make without delivering mail.
<b><a href="postconf.5.html#smtpd_junk_command_limit">smtpd_junk_command_limit</a> (normal: 100, overload: 1)</b>
- The number of junk commands (NOOP, VRFY, ETRN or RSET) that a
- remote SMTP client can send before the Postfix SMTP server
+ The number of junk commands (NOOP, VRFY, ETRN or RSET) that a
+ remote SMTP client can send before the Postfix SMTP server
starts to increment the error counter with each junk command.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_recipient_overshoot_limit">smtpd_recipient_overshoot_limit</a> (1000)</b>
- The number of recipients that a remote SMTP client can send in
+ The number of recipients that a remote SMTP client can send in
excess of the limit specified with $<a href="postconf.5.html#smtpd_recipient_limit">smtpd_recipient_limit</a>,
- before the Postfix SMTP server increments the per-session error
+ before the Postfix SMTP server increments the per-session error
count for each excess recipient.
<b>ACCESS POLICY DELEGATION CONTROLS</b>
- As of version 2.1, Postfix can be configured to delegate access policy
- decisions to an external server that runs outside Postfix. See the
+ As of version 2.1, Postfix can be configured to delegate access policy
+ decisions to an external server that runs outside Postfix. See the
file <a href="SMTPD_POLICY_README.html">SMTPD_POLICY_README</a> for more information.
<b><a href="postconf.5.html#smtpd_policy_service_max_idle">smtpd_policy_service_max_idle</a> (300s)</b>
- The time after which an idle SMTPD policy service connection is
+ The time after which an idle SMTPD policy service connection is
closed.
<b><a href="postconf.5.html#smtpd_policy_service_max_ttl">smtpd_policy_service_max_ttl</a> (1000s)</b>
- The time after which an active SMTPD policy service connection
+ The time after which an active SMTPD policy service connection
is closed.
<b><a href="postconf.5.html#smtpd_policy_service_timeout">smtpd_policy_service_timeout</a> (100s)</b>
- The time limit for connecting to, writing to, or receiving from
+ The time limit for connecting to, writing to, or receiving from
a delegated SMTPD policy server.
Available in Postfix version 3.0 and later:
The default action when an SMTPD policy service request fails.
<b><a href="postconf.5.html#smtpd_policy_service_request_limit">smtpd_policy_service_request_limit</a> (0)</b>
- The maximal number of requests per SMTPD policy service connec-
+ The maximal number of requests per SMTPD policy service connec-
tion, or zero (no limit).
<b><a href="postconf.5.html#smtpd_policy_service_try_limit">smtpd_policy_service_try_limit</a> (2)</b>
- The maximal number of attempts to send an SMTPD policy service
+ The maximal number of attempts to send an SMTPD policy service
request before giving up.
<b><a href="postconf.5.html#smtpd_policy_service_retry_delay">smtpd_policy_service_retry_delay</a> (1s)</b>
- The delay between attempts to resend a failed SMTPD policy ser-
+ The delay between attempts to resend a failed SMTPD policy ser-
vice request.
Available in Postfix version 3.1 and later:
<b><a href="postconf.5.html#smtpd_policy_service_policy_context">smtpd_policy_service_policy_context</a> (empty)</b>
- Optional information that the Postfix SMTP server specifies in
- the "policy_context" attribute of a policy service request
- (originally, to share the same service endpoint among multiple
+ Optional information that the Postfix SMTP server specifies in
+ the "policy_context" attribute of a policy service request
+ (originally, to share the same service endpoint among multiple
<a href="postconf.5.html#check_policy_service">check_policy_service</a> clients).
<b>ACCESS CONTROLS</b>
- The <a href="SMTPD_ACCESS_README.html">SMTPD_ACCESS_README</a> document gives an introduction to all the SMTP
+ The <a href="SMTPD_ACCESS_README.html">SMTPD_ACCESS_README</a> document gives an introduction to all the SMTP
server access control features.
<b><a href="postconf.5.html#smtpd_delay_reject">smtpd_delay_reject</a> (yes)</b>
- Wait until the RCPT TO command before evaluating
+ Wait until the RCPT TO command before evaluating
$<a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a>, $<a href="postconf.5.html#smtpd_helo_restrictions">smtpd_helo_restrictions</a> and
$<a href="postconf.5.html#smtpd_sender_restrictions">smtpd_sender_restrictions</a>, or wait until the ETRN command
- before evaluating $<a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a> and
+ before evaluating $<a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a> and
$<a href="postconf.5.html#smtpd_helo_restrictions">smtpd_helo_restrictions</a>.
<b><a href="postconf.5.html#parent_domain_matches_subdomains">parent_domain_matches_subdomains</a> (see 'postconf -d' output)</b>
- A list of Postfix features where the pattern "example.com" also
- matches subdomains of example.com, instead of requiring an
+ A list of Postfix features where the pattern "example.com" also
+ matches subdomains of example.com, instead of requiring an
explicit ".example.com" pattern.
<b><a href="postconf.5.html#smtpd_client_restrictions">smtpd_client_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server applies in
+ Optional restrictions that the Postfix SMTP server applies in
the context of a client connection request.
<b><a href="postconf.5.html#smtpd_helo_required">smtpd_helo_required</a> (no)</b>
- Require that a remote SMTP client introduces itself with the
- HELO or EHLO command before sending the MAIL command or other
+ Require that a remote SMTP client introduces itself with the
+ HELO or EHLO command before sending the MAIL command or other
commands that require EHLO negotiation.
<b><a href="postconf.5.html#smtpd_helo_restrictions">smtpd_helo_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server applies in
+ Optional restrictions that the Postfix SMTP server applies in
the context of a client HELO command.
<b><a href="postconf.5.html#smtpd_sender_restrictions">smtpd_sender_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server applies in
+ Optional restrictions that the Postfix SMTP server applies in
the context of a client MAIL FROM command.
<b><a href="postconf.5.html#smtpd_recipient_restrictions">smtpd_recipient_restrictions</a> (see 'postconf -d' output)</b>
- Optional restrictions that the Postfix SMTP server applies in
- the context of a client RCPT TO command, after
+ Optional restrictions that the Postfix SMTP server applies in
+ the context of a client RCPT TO command, after
<a href="postconf.5.html#smtpd_relay_restrictions">smtpd_relay_restrictions</a>.
<b><a href="postconf.5.html#smtpd_etrn_restrictions">smtpd_etrn_restrictions</a> (empty)</b>
- Optional restrictions that the Postfix SMTP server applies in
+ Optional restrictions that the Postfix SMTP server applies in
the context of a client ETRN command.
<b><a href="postconf.5.html#allow_untrusted_routing">allow_untrusted_routing</a> (no)</b>
- Forward mail with sender-specified routing
- (user[@%!]remote[@%!]site) from untrusted clients to destina-
+ Forward mail with sender-specified routing
+ (user[@%!]remote[@%!]site) from untrusted clients to destina-
tions matching $<a href="postconf.5.html#relay_domains">relay_domains</a>.
<b><a href="postconf.5.html#smtpd_restriction_classes">smtpd_restriction_classes</a> (empty)</b>
User-defined aliases for groups of access restrictions.
<b><a href="postconf.5.html#smtpd_null_access_lookup_key">smtpd_null_access_lookup_key</a> (</b><><b>)</b>
- The lookup key to be used in SMTP <a href="access.5.html"><b>access</b>(5)</a> tables instead of
+ The lookup key to be used in SMTP <a href="access.5.html"><b>access</b>(5)</a> tables instead of
the null sender address.
<b><a href="postconf.5.html#permit_mx_backup_networks">permit_mx_backup_networks</a> (empty)</b>
- Restrict the use of the <a href="postconf.5.html#permit_mx_backup">permit_mx_backup</a> SMTP access feature to
+ Restrict the use of the <a href="postconf.5.html#permit_mx_backup">permit_mx_backup</a> SMTP access feature to
only domains whose primary MX hosts match the listed networks.
Available in Postfix version 2.0 and later:
applies in the context of the SMTP DATA command.
<b><a href="postconf.5.html#smtpd_expansion_filter">smtpd_expansion_filter</a> (see 'postconf -d' output)</b>
- What characters are allowed in $name expansions of RBL reply
+ What characters are allowed in $name expansions of RBL reply
templates.
Available in Postfix version 2.1 and later:
<b><a href="postconf.5.html#smtpd_reject_unlisted_sender">smtpd_reject_unlisted_sender</a> (no)</b>
- Request that the Postfix SMTP server rejects mail from unknown
- sender
addresses, even when no explicit <a href="postconf.5.html#reject_unlisted_sender">reject_unlisted_sender</a>
+ Request that the Postfix SMTP server rejects mail from unknown
+ sender
addresses, even when no explicit <a href="postconf.5.html#reject_unlisted_sender">reject_unlisted_sender</a>
access restriction is specified.
<b><a href="postconf.5.html#smtpd_reject_unlisted_recipient">smtpd_reject_unlisted_recipient</a> (yes)</b>
- Request that the Postfix SMTP server rejects mail for unknown
- recipient addresses, even when no explicit
+ Request that the Postfix SMTP server rejects mail for unknown
+ recipient addresses, even when no explicit
<a href="postconf.5.html#reject_unlisted_recipient">reject_unlisted_recipient</a> access restriction is specified.
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtpd_relay_restrictions">smtpd_relay_restrictions</a> (<a href="postconf.5.html#permit_mynetworks">permit_mynetworks</a>, <a href="postconf.5.html#permit_sasl_authenticated">permit_sasl_authenticated</a>,</b>
<b><a href="postconf.5.html#defer_unauth_destination">defer_unauth_destination</a>)</b>
Access restrictions for mail relay control that the Postfix SMTP
- server applies in the context of the RCPT TO command, before
+ server applies in the context of the RCPT TO command, before
<a href="postconf.5.html#smtpd_recipient_restrictions">smtpd_recipient_restrictions</a>.
<b>SENDER AND RECIPIENT ADDRESS VERIFICATION CONTROLS</b>
- Postfix version 2.1 introduces sender and recipient address verifica-
+ Postfix version 2.1 introduces sender and recipient address verifica-
tion. This feature is implemented by sending probe email messages that
are not actually delivered. This feature is requested via the
- <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a> and <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> access
- restrictions. The status of verification probes is maintained by the
- <a href="verify.8.html"><b>verify</b>(8)</a> server. See the file <a href="ADDRESS_VERIFICATION_README.html">ADDRESS_VERIFICATION_README</a> for infor-
- mation about how to configure and operate the Postfix sender/recipient
+ <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a> and <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> access
+ restrictions. The status of verification probes is maintained by the
+ <a href="verify.8.html"><b>verify</b>(8)</a> server. See the file <a href="ADDRESS_VERIFICATION_README.html">ADDRESS_VERIFICATION_README</a> for infor-
+ mation about how to configure and operate the Postfix sender/recipient
address verification service.
<b><a href="postconf.5.html#address_verify_poll_count">address_verify_poll_count</a> (normal: 3, overload: 1)</b>
fication request in progress.
<b><a href="postconf.5.html#address_verify_sender">address_verify_sender</a> ($<a href="postconf.5.html#double_bounce_sender">double_bounce_sender</a>)</b>
- The sender address to use in address verification probes; prior
+ The sender address to use in address verification probes; prior
to Postfix 2.5 the default was "postmaster".
<b><a href="postconf.5.html#unverified_sender_reject_code">unverified_sender_reject_code</a> (450)</b>
address is rejected by the <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a> restriction.
<b><a href="postconf.5.html#unverified_recipient_reject_code">unverified_recipient_reject_code</a> (450)</b>
- The numerical Postfix SMTP server response when a recipient
- address is rejected by the <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> restric-
+ The numerical Postfix SMTP server response when a recipient
+ address is rejected by the <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a> restric-
tion.
Available in Postfix version 2.6 and later:
<b><a href="postconf.5.html#unverified_sender_defer_code">unverified_sender_defer_code</a> (450)</b>
- The numerical Postfix SMTP server response code when a sender
+ The numerical Postfix SMTP server response code when a sender
address probe fails due to a temporary error condition.
<b><a href="postconf.5.html#unverified_recipient_defer_code">unverified_recipient_defer_code</a> (450)</b>
- The numerical Postfix SMTP server response when a recipient
+ The numerical Postfix SMTP server response when a recipient
address probe fails due to a temporary error condition.
<b><a href="postconf.5.html#unverified_sender_reject_reason">unverified_sender_reject_reason</a> (empty)</b>
<a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipient</a>.
<b><a href="postconf.5.html#unverified_sender_tempfail_action">unverified_sender_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a>)</b>
- The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a>
+ The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unverified_sender">reject_unverified_sender</a>
fails due to a temporary error condition.
<b><a href="postconf.5.html#unverified_recipient_tempfail_action">unverified_recipient_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a>)</b>
- The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipi</a>-
+ The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unverified_recipient">reject_unverified_recipi</a>-
<a href="postconf.5.html#reject_unverified_recipient">ent</a> fails due to a temporary error condition.
Available with Postfix 2.9 and later:
<b><a href="postconf.5.html#address_verify_sender_ttl">address_verify_sender_ttl</a> (0s)</b>
- The time between changes in the time-dependent portion of
+ The time between changes in the time-dependent portion of
address verification probe sender addresses.
<b>ACCESS CONTROL RESPONSES</b>
map "reject" action.
<b><a href="postconf.5.html#defer_code">defer_code</a> (450)</b>
- The numerical Postfix SMTP server response code when a remote
+ The numerical Postfix SMTP server response code when a remote
SMTP client request is rejected by the "defer" restriction.
<b><a href="postconf.5.html#invalid_hostname_reject_code">invalid_hostname_reject_code</a> (501)</b>
- The numerical Postfix SMTP server response code when the client
- HELO or EHLO command parameter is rejected by the
+ The numerical Postfix SMTP server response code when the client
+ HELO or EHLO command parameter is rejected by the
<a href="postconf.5.html#reject_invalid_helo_hostname">reject_invalid_helo_hostname</a> restriction.
<b><a href="postconf.5.html#maps_rbl_reject_code">maps_rbl_reject_code</a> (554)</b>
- The numerical Postfix SMTP server response code when a remote
- SMTP
client request is blocked by the <a href="postconf.5.html#reject_rbl_client">reject_rbl_client</a>,
+ The numerical Postfix SMTP server response code when a remote
+ SMTP
client request is blocked by the <a href="postconf.5.html#reject_rbl_client">reject_rbl_client</a>,
<a href="postconf.5.html#reject_rhsbl_client">reject_rhsbl_client</a>, <a href="postconf.5.html#reject_rhsbl_reverse_client">reject_rhsbl_reverse_client</a>,
<a href="postconf.5.html#reject_rhsbl_sender">reject_rhsbl_sender</a> or <a href="postconf.5.html#reject_rhsbl_recipient">reject_rhsbl_recipient</a> restriction.
<b><a href="postconf.5.html#non_fqdn_reject_code">non_fqdn_reject_code</a> (504)</b>
- The numerical Postfix SMTP server reply code when a client
- request
is rejected by the <a href="postconf.5.html#reject_non_fqdn_helo_hostname">reject_non_fqdn_helo_hostname</a>,
+ The numerical Postfix SMTP server reply code when a client
+ request
is rejected by the <a href="postconf.5.html#reject_non_fqdn_helo_hostname">reject_non_fqdn_helo_hostname</a>,
<a href="postconf.5.html#reject_non_fqdn_sender">reject_non_fqdn_sender</a> or <a href="postconf.5.html#reject_non_fqdn_recipient">reject_non_fqdn_recipient</a> restriction.
<b><a href="postconf.5.html#plaintext_reject_code">plaintext_reject_code</a> (450)</b>
- The numerical Postfix SMTP server response code when a request
+ The numerical Postfix SMTP server response code when a request
is rejected by the <b><a href="postconf.5.html#reject_plaintext_session">reject_plaintext_session</a></b> restriction.
<b><a href="postconf.5.html#reject_code">reject_code</a> (554)</b>
- The numerical Postfix SMTP server response code when a remote
+ The numerical Postfix SMTP server response code when a remote
SMTP client request is rejected by the "reject" restriction.
<b><a href="postconf.5.html#relay_domains_reject_code">relay_domains_reject_code</a> (554)</b>
- The numerical Postfix SMTP server response code when a client
- request is rejected by the <a href="postconf.5.html#reject_unauth_destination">reject_unauth_destination</a> recipient
+ The numerical Postfix SMTP server response code when a client
+ request is rejected by the <a href="postconf.5.html#reject_unauth_destination">reject_unauth_destination</a> recipient
restriction.
<b><a href="postconf.5.html#unknown_address_reject_code">unknown_address_reject_code</a> (450)</b>
a sender or recipient address because its domain is unknown.
<b><a href="postconf.5.html#unknown_client_reject_code">unknown_client_reject_code</a> (450)</b>
- The numerical Postfix SMTP server response code when a client
- without valid address <=> name mapping is rejected by the
+ The numerical Postfix SMTP server response code when a client
+ without valid address <=> name mapping is rejected by the
<a href="postconf.5.html#reject_unknown_client_hostname">reject_unknown_client_hostname</a> restriction.
<b><a href="postconf.5.html#unknown_hostname_reject_code">unknown_hostname_reject_code</a> (450)</b>
- The numerical Postfix SMTP server response code when the host-
- name specified with the HELO or EHLO command is rejected by the
+ The numerical Postfix SMTP server response code when the host-
+ name specified with the HELO or EHLO command is rejected by the
<a href="postconf.5.html#reject_unknown_helo_hostname">reject_unknown_helo_hostname</a> restriction.
Available in Postfix version 2.0 and later:
<b><a href="postconf.5.html#default_rbl_reply">default_rbl_reply</a> (see 'postconf -d' output)</b>
- The default Postfix SMTP server response template for a request
+ The default Postfix SMTP server response template for a request
that is rejected by an RBL-based restriction.
<b><a href="postconf.5.html#multi_recipient_bounce_reject_code">multi_recipient_bounce_reject_code</a> (550)</b>
- The numerical Postfix SMTP server response code when a remote
- SMTP
client request is blocked by the <a href="postconf.5.html#reject_multi_recipient_bounce">reject_multi_recipi</a>-
+ The numerical Postfix SMTP server response code when a remote
+ SMTP
client request is blocked by the <a href="postconf.5.html#reject_multi_recipient_bounce">reject_multi_recipi</a>-
<a href="postconf.5.html#reject_multi_recipient_bounce">ent_bounce</a> restriction.
<b><a href="postconf.5.html#rbl_reply_maps">rbl_reply_maps</a> (empty)</b>
<b><a href="postconf.5.html#access_map_defer_code">access_map_defer_code</a> (450)</b>
The numerical Postfix SMTP server response code for an <a href="access.5.html"><b>access</b>(5)</a>
- map "defer" action, including "<a href="postconf.5.html#defer_if_permit">defer_if_permit</a>" or
+ map "defer" action, including "<a href="postconf.5.html#defer_if_permit">defer_if_permit</a>" or
"<a href="postconf.5.html#defer_if_reject">defer_if_reject</a>".
<b><a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a> (<a href="postconf.5.html#defer_if_permit">defer_if_permit</a>)</b>
- The Postfix SMTP server's action when a reject-type restriction
+ The Postfix SMTP server's action when a reject-type restriction
fails due to a temporary error condition.
<b><a href="postconf.5.html#unknown_helo_hostname_tempfail_action">unknown_helo_hostname_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a>)</b>
- The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unknown_helo_hostname">reject_unknown_helo_host</a>-
+ The
Postfix SMTP server's action when <a href="postconf.5.html#reject_unknown_helo_hostname">reject_unknown_helo_host</a>-
<a href="postconf.5.html#reject_unknown_helo_hostname">name</a> fails due to a temporary error condition.
<b><a href="postconf.5.html#unknown_address_tempfail_action">unknown_address_tempfail_action</a> ($<a href="postconf.5.html#reject_tempfail_action">reject_tempfail_action</a>)</b>
- The Postfix SMTP server's action when
- <a href="postconf.5.html#reject_unknown_sender_domain">reject_unknown_sender_domain</a>
or <a href="postconf.5.html#reject_unknown_recipient_domain">reject_unknown_recipient_domain</a>
+ The Postfix SMTP server's action when
+ <a href="postconf.5.html#reject_unknown_sender_domain">reject_unknown_sender_domain</a>
or <a href="postconf.5.html#reject_unknown_recipient_domain">reject_unknown_recipient_domain</a>
fail due to a temporary error condition.
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
- The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
+ The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
figuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
- How much time a Postfix daemon process may take to handle a
+ How much time a Postfix daemon process may take to handle a
request before it is terminated by a built-in watchdog timer.
<b><a href="postconf.5.html#command_directory">command_directory</a> (see 'postconf -d' output)</b>
The location of all postfix administrative commands.
<b><a href="postconf.5.html#double_bounce_sender">double_bounce_sender</a> (double-bounce)</b>
- The sender address of postmaster notifications that are gener-
+ The sender address of postmaster notifications that are gener-
ated by the mail system.
<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
- The time limit for sending or receiving information over an
+ The time limit for sending or receiving information over an
internal communication channel.
<b><a href="postconf.5.html#mail_name">mail_name</a> (Postfix)</b>
- The mail system name that is displayed in Received: headers, in
+ The mail system name that is displayed in Received: headers, in
the SMTP greeting banner, and in bounced mail.
<b><a href="postconf.5.html#mail_owner">mail_owner</a> (postfix)</b>
- The UNIX system account that owns the Postfix queue and most
+ The UNIX system account that owns the Postfix queue and most
Postfix daemon processes.
<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
- The maximum amount of time that an idle Postfix daemon process
+ The maximum amount of time that an idle Postfix daemon process
waits for an incoming connection before terminating voluntarily.
<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
The internet hostname of this mail system.
<b><a href="postconf.5.html#mynetworks">mynetworks</a> (see 'postconf -d' output)</b>
- The list of "trusted" remote SMTP clients that have more privi-
+ The list of "trusted" remote SMTP clients that have more privi-
leges than "strangers".
<b><a href="postconf.5.html#myorigin">myorigin</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
- The domain name that locally-posted mail appears to come from,
+ The domain name that locally-posted mail appears to come from,
and that locally posted mail is delivered to.
<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
The location of the Postfix top-level queue directory.
<b><a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a> (empty)</b>
- The set of characters that can separate an email address local-
+ The set of characters that can separate an email address local-
part, user name, or a .forward file name from its extension.
<b><a href="postconf.5.html#smtpd_banner">smtpd_banner</a> ($<a href="postconf.5.html#myhostname">myhostname</a> ESMTP $<a href="postconf.5.html#mail_name">mail_name</a>)</b>
- The text that follows the 220 status code in the SMTP greeting
+ The text that follows the 220 status code in the SMTP greeting
banner.
<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
- A prefix that is prepended to the process name in syslog
+ A prefix that is prepended to the process name in syslog
records, so that, for example, "smtpd" becomes "prefix/smtpd".
Available in Postfix version 2.2 and later:
<b><a href="postconf.5.html#smtpd_forbidden_commands">smtpd_forbidden_commands</a> (CONNECT GET POST <a href="regexp_table.5.html">regexp</a>:{{/^[^A-Z]/ Bogus}})</b>
- List of commands that cause the Postfix SMTP server to immedi-
+ List of commands that cause the Postfix SMTP server to immedi-
ately terminate the session with a 221 code.
Available in Postfix version 2.5 and later:
Available in Postfix 3.4 and later:
<b><a href="postconf.5.html#smtpd_reject_footer_maps">smtpd_reject_footer_maps</a> (empty)</b>
- Lookup tables, indexed by the complete Postfix SMTP server 4xx
+ Lookup tables, indexed by the complete Postfix SMTP server 4xx
or 5xx response, with reject footer templates.
<b>SEE ALSO</b>
(FFDHE) key exchange groups supported by the Postfix SMTP client
and server.
+ Available in Postfix version 3.9 and later:
+
+ <b><a href="postconf.5.html#tls_config_file">tls_config_file</a> (default)</b>
+ Optional configuration file with baseline OpenSSL settings.
+
+ <b><a href="postconf.5.html#tls_config_name">tls_config_name</a> (empty)</b>
+ The application name passed by Postfix to OpenSSL library ini-
+ tialization functions.
+
<b>STARTTLS SERVER CONTROLS</b>
- These settings are clones of Postfix SMTP server settings. They allow
+ These settings are clones of Postfix SMTP server settings. They allow
<a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> to load the same certificate and private key information as
- the Postfix SMTP server, before dropping privileges, so that the key
- files can be kept read-only for root. These settings can currently not
- be overruled by information in a <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client request, but that
+ the Postfix SMTP server, before dropping privileges, so that the key
+ files can be kept read-only for root. These settings can currently not
+ be overruled by information in a <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client request, but that
limitation may be removed in a future version.
<b><a href="postconf.5.html#tlsproxy_tls_CAfile">tlsproxy_tls_CAfile</a> ($<a href="postconf.5.html#smtpd_tls_CAfile">smtpd_tls_CAfile</a>)</b>
- A file containing (PEM format) CA certificates of root CAs
+ A file containing (PEM format) CA certificates of root CAs
trusted to sign either remote SMTP client certificates or inter-
mediate CA certificates.
<b><a href="postconf.5.html#tlsproxy_tls_CApath">tlsproxy_tls_CApath</a> ($<a href="postconf.5.html#smtpd_tls_CApath">smtpd_tls_CApath</a>)</b>
- A directory containing (PEM format) CA certificates of root CAs
+ A directory containing (PEM format) CA certificates of root CAs
trusted to sign either remote SMTP client certificates or inter-
mediate CA certificates.
<b><a href="postconf.5.html#tlsproxy_tls_always_issue_session_ids">tlsproxy_tls_always_issue_session_ids</a> ($<a href="postconf.5.html#smtpd_tls_always_issue_session_ids">smtpd_tls_always_issue_ses</a>-</b>
<b><a href="postconf.5.html#smtpd_tls_always_issue_session_ids">sion_ids</a>)</b>
- Force the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server to issue a TLS session id,
+ Force the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server to issue a TLS session id,
even when TLS session caching is turned off.
<b><a href="postconf.5.html#tlsproxy_tls_ask_ccert">tlsproxy_tls_ask_ccert</a> ($<a href="postconf.5.html#smtpd_tls_ask_ccert">smtpd_tls_ask_ccert</a>)</b>
The verification depth for remote SMTP client certificates.
<b><a href="postconf.5.html#tlsproxy_tls_cert_file">tlsproxy_tls_cert_file</a> ($<a href="postconf.5.html#smtpd_tls_cert_file">smtpd_tls_cert_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server RSA certificate in PEM
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server RSA certificate in PEM
format.
<b><a href="postconf.5.html#tlsproxy_tls_ciphers">tlsproxy_tls_ciphers</a> ($<a href="postconf.5.html#smtpd_tls_ciphers">smtpd_tls_ciphers</a>)</b>
will use with opportunistic TLS encryption.
<b><a href="postconf.5.html#tlsproxy_tls_dcert_file">tlsproxy_tls_dcert_file</a> ($<a href="postconf.5.html#smtpd_tls_dcert_file">smtpd_tls_dcert_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server DSA certificate in PEM
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server DSA certificate in PEM
format.
<b><a href="postconf.5.html#tlsproxy_tls_dh1024_param_file">tlsproxy_tls_dh1024_param_file</a> ($<a href="postconf.5.html#smtpd_tls_dh1024_param_file">smtpd_tls_dh1024_param_file</a>)</b>
- File with DH parameters that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server
+ File with DH parameters that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server
should use with non-export EDH ciphers.
<b><a href="postconf.5.html#tlsproxy_tls_dh512_param_file">tlsproxy_tls_dh512_param_file</a> ($<a href="postconf.5.html#smtpd_tls_dh512_param_file">smtpd_tls_dh512_param_file</a>)</b>
- File with DH parameters that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server
+ File with DH parameters that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server
should use with export-grade EDH ciphers.
<b><a href="postconf.5.html#tlsproxy_tls_dkey_file">tlsproxy_tls_dkey_file</a> ($<a href="postconf.5.html#smtpd_tls_dkey_file">smtpd_tls_dkey_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server DSA private key in PEM
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server DSA private key in PEM
format.
<b><a href="postconf.5.html#tlsproxy_tls_eccert_file">tlsproxy_tls_eccert_file</a> ($<a href="postconf.5.html#smtpd_tls_eccert_file">smtpd_tls_eccert_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server ECDSA certificate in
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server ECDSA certificate in
PEM format.
<b><a href="postconf.5.html#tlsproxy_tls_eckey_file">tlsproxy_tls_eckey_file</a> ($<a href="postconf.5.html#smtpd_tls_eckey_file">smtpd_tls_eckey_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server ECDSA private key in
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server ECDSA private key in
PEM format.
<b><a href="postconf.5.html#tlsproxy_tls_eecdh_grade">tlsproxy_tls_eecdh_grade</a> ($<a href="postconf.5.html#smtpd_tls_eecdh_grade">smtpd_tls_eecdh_grade</a>)</b>
- The Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server security grade for ephemeral
+ The Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server security grade for ephemeral
elliptic-curve Diffie-Hellman (EECDH) key exchange.
<b><a href="postconf.5.html#tlsproxy_tls_exclude_ciphers">tlsproxy_tls_exclude_ciphers</a> ($<a href="postconf.5.html#smtpd_tls_exclude_ciphers">smtpd_tls_exclude_ciphers</a>)</b>
- List
of ciphers or cipher types to exclude from the <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>
+ List
of ciphers or cipher types to exclude from the <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>
server cipher list at all TLS security levels.
<b><a href="postconf.5.html#tlsproxy_tls_fingerprint_digest">tlsproxy_tls_fingerprint_digest</a> ($<a href="postconf.5.html#smtpd_tls_fingerprint_digest">smtpd_tls_fingerprint_digest</a>)</b>
- The message digest algorithm to construct remote SMTP
+ The message digest algorithm to construct remote SMTP
client-certificate fingerprints.
<b><a href="postconf.5.html#tlsproxy_tls_key_file">tlsproxy_tls_key_file</a> ($<a href="postconf.5.html#smtpd_tls_key_file">smtpd_tls_key_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server RSA private key in PEM
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server RSA private key in PEM
format.
<b><a href="postconf.5.html#tlsproxy_tls_loglevel">tlsproxy_tls_loglevel</a> ($<a href="postconf.5.html#smtpd_tls_loglevel">smtpd_tls_loglevel</a>)</b>
- Enable additional Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server logging of TLS
+ Enable additional Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server logging of TLS
activity.
<b><a href="postconf.5.html#tlsproxy_tls_mandatory_ciphers">tlsproxy_tls_mandatory_ciphers</a> ($<a href="postconf.5.html#smtpd_tls_mandatory_ciphers">smtpd_tls_mandatory_ciphers</a>)</b>
<b><a href="postconf.5.html#tlsproxy_tls_mandatory_exclude_ciphers">tlsproxy_tls_mandatory_exclude_ciphers</a> ($<a href="postconf.5.html#smtpd_tls_mandatory_exclude_ciphers">smtpd_tls_manda</a>-</b>
<b><a href="postconf.5.html#smtpd_tls_mandatory_exclude_ciphers">tory_exclude_ciphers</a>)</b>
- Additional list of ciphers or cipher types to exclude from the
+ Additional list of ciphers or cipher types to exclude from the
<a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server cipher list at mandatory TLS security levels.
<b><a href="postconf.5.html#tlsproxy_tls_mandatory_protocols">tlsproxy_tls_mandatory_protocols</a> ($<a href="postconf.5.html#smtpd_tls_mandatory_protocols">smtpd_tls_mandatory_protocols</a>)</b>
with mandatory TLS encryption.
<b><a href="postconf.5.html#tlsproxy_tls_protocols">tlsproxy_tls_protocols</a> ($<a href="postconf.5.html#smtpd_tls_protocols">smtpd_tls_protocols</a>)</b>
- List of TLS protocols that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server will
+ List of TLS protocols that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server will
exclude or include with opportunistic TLS encryption.
<b><a href="postconf.5.html#tlsproxy_tls_req_ccert">tlsproxy_tls_req_ccert</a> ($<a href="postconf.5.html#smtpd_tls_req_ccert">smtpd_tls_req_ccert</a>)</b>
- With mandatory TLS encryption, require a trusted remote SMTP
+ With mandatory TLS encryption, require a trusted remote SMTP
client certificate in order to allow TLS connections to proceed.
<b><a href="postconf.5.html#tlsproxy_tls_security_level">tlsproxy_tls_security_level</a> ($<a href="postconf.5.html#smtpd_tls_security_level">smtpd_tls_security_level</a>)</b>
- The SMTP TLS security level for the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server;
+ The SMTP TLS security level for the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> 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#tlsproxy_tls_chain_files">tlsproxy_tls_chain_files</a> ($<a href="postconf.5.html#smtpd_tls_chain_files">smtpd_tls_chain_files</a>)</b>
- Files with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server keys and certificate
+ Files with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server keys and certificate
chains in PEM format.
<b>STARTTLS CLIENT CONTROLS</b>
- These settings are clones of Postfix SMTP client settings. They allow
+ These settings are clones of Postfix SMTP client settings. They allow
<a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> to load the same certificate and private key information as
- the Postfix SMTP client, before dropping privileges, so that the key
+ the Postfix SMTP client, before dropping privileges, so that the key
files can be kept read-only for root. Some settings may be overruled by
information in a <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client request.
Available in Postfix version 3.4 and later:
<b><a href="postconf.5.html#tlsproxy_client_CAfile">tlsproxy_client_CAfile</a> ($<a href="postconf.5.html#smtp_tls_CAfile">smtp_tls_CAfile</a>)</b>
- A file containing CA certificates of root CAs trusted to sign
- either remote TLS server certificates or intermediate CA cer-
+ A file containing CA certificates of root CAs trusted to sign
+ either remote TLS server certificates or intermediate CA cer-
tificates.
<b><a href="postconf.5.html#tlsproxy_client_CApath">tlsproxy_client_CApath</a> ($<a href="postconf.5.html#smtp_tls_CApath">smtp_tls_CApath</a>)</b>
- Directory with PEM format Certification Authority certificates
- that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client uses to verify a remote TLS
+ Directory with PEM format Certification Authority certificates
+ that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client uses to verify a remote TLS
server certificate.
<b><a href="postconf.5.html#tlsproxy_client_chain_files">tlsproxy_client_chain_files</a> ($<a href="postconf.5.html#smtp_tls_chain_files">smtp_tls_chain_files</a>)</b>
- Files with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client keys and certificate
+ Files with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client keys and certificate
chains in PEM format.
<b><a href="postconf.5.html#tlsproxy_client_cert_file">tlsproxy_client_cert_file</a> ($<a href="postconf.5.html#smtp_tls_cert_file">smtp_tls_cert_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client RSA certificate in PEM
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client RSA certificate in PEM
format.
<b><a href="postconf.5.html#tlsproxy_client_key_file">tlsproxy_client_key_file</a> ($<a href="postconf.5.html#smtp_tls_key_file">smtp_tls_key_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client RSA private key in PEM
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client RSA private key in PEM
format.
<b><a href="postconf.5.html#tlsproxy_client_dcert_file">tlsproxy_client_dcert_file</a> ($<a href="postconf.5.html#smtp_tls_dcert_file">smtp_tls_dcert_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client DSA certificate in PEM
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client DSA certificate in PEM
format.
<b><a href="postconf.5.html#tlsproxy_client_dkey_file">tlsproxy_client_dkey_file</a> ($<a href="postconf.5.html#smtp_tls_dkey_file">smtp_tls_dkey_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client DSA private key in PEM
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client DSA private key in PEM
format.
<b><a href="postconf.5.html#tlsproxy_client_eccert_file">tlsproxy_client_eccert_file</a> ($<a href="postconf.5.html#smtp_tls_eccert_file">smtp_tls_eccert_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client ECDSA certificate in
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client ECDSA certificate in
PEM format.
<b><a href="postconf.5.html#tlsproxy_client_eckey_file">tlsproxy_client_eckey_file</a> ($<a href="postconf.5.html#smtp_tls_eckey_file">smtp_tls_eckey_file</a>)</b>
- File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client ECDSA private key in
+ File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client ECDSA private key in
PEM format.
<b><a href="postconf.5.html#tlsproxy_client_fingerprint_digest">tlsproxy_client_fingerprint_digest</a> ($<a href="postconf.5.html#smtp_tls_fingerprint_digest">smtp_tls_fingerprint_digest</a>)</b>
certificate fingerprints.
<b><a href="postconf.5.html#tlsproxy_client_loglevel">tlsproxy_client_loglevel</a> ($<a href="postconf.5.html#smtp_tls_loglevel">smtp_tls_loglevel</a>)</b>
- Enable additional Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client logging of TLS
+ Enable additional Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client logging of TLS
activity.
<b><a href="postconf.5.html#tlsproxy_client_loglevel_parameter">tlsproxy_client_loglevel_parameter</a> (<a href="postconf.5.html#smtp_tls_loglevel">smtp_tls_loglevel</a>)</b>
The verification depth for remote TLS server certificates.
<b><a href="postconf.5.html#tlsproxy_client_use_tls">tlsproxy_client_use_tls</a> ($<a href="postconf.5.html#smtp_use_tls">smtp_use_tls</a>)</b>
- Opportunistic mode: use TLS when a remote server announces TLS
+ Opportunistic mode: use TLS when a remote server announces TLS
support.
<b><a href="postconf.5.html#tlsproxy_client_enforce_tls">tlsproxy_client_enforce_tls</a> ($<a href="postconf.5.html#smtp_enforce_tls">smtp_enforce_tls</a>)</b>
- Enforcement mode: require that SMTP servers use TLS encryption.
+ Enforcement mode: require that SMTP servers use TLS encryption.
<b><a href="postconf.5.html#tlsproxy_client_per_site">tlsproxy_client_per_site</a> ($<a href="postconf.5.html#smtp_tls_per_site">smtp_tls_per_site</a>)</b>
- Optional lookup tables with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client TLS
- usage policy by next-hop destination and by remote TLS server
+ Optional lookup tables with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client TLS
+ usage policy by next-hop destination and by remote TLS server
hostname.
Available in Postfix version 3.4-3.6:
<b><a href="postconf.5.html#tlsproxy_client_level">tlsproxy_client_level</a> ($<a href="postconf.5.html#smtp_tls_security_level">smtp_tls_security_level</a>)</b>
- The
default TLS security level for the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>
+ The
default TLS security level for the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>
client.
<b><a href="postconf.5.html#tlsproxy_client_policy">tlsproxy_client_policy</a> ($<a href="postconf.5.html#smtp_tls_policy_maps">smtp_tls_policy_maps</a>)</b>
- Optional lookup tables with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client TLS
+ Optional lookup tables with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client TLS
security policy by next-hop destination.
Available in Postfix version 3.7 and later:
<b><a href="postconf.5.html#tlsproxy_client_security_level">tlsproxy_client_security_level</a> ($<a href="postconf.5.html#smtp_tls_security_level">smtp_tls_security_level</a>)</b>
- The
default TLS security level for the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>
+ The
default TLS security level for the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>
client.
<b><a href="postconf.5.html#tlsproxy_client_policy_maps">tlsproxy_client_policy_maps</a> ($<a href="postconf.5.html#smtp_tls_policy_maps">smtp_tls_policy_maps</a>)</b>
- Optional lookup tables with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client TLS
+ Optional lookup tables with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client TLS
security policy by next-hop destination.
<b>OBSOLETE STARTTLS SUPPORT CONTROLS</b>
- These parameters are supported for compatibility with <a href="smtpd.8.html"><b>smtpd</b>(8)</a> legacy
+ These parameters are supported for compatibility with <a href="smtpd.8.html"><b>smtpd</b>(8)</a> legacy
parameters.
<b><a href="postconf.5.html#tlsproxy_use_tls">tlsproxy_use_tls</a> ($<a href="postconf.5.html#smtpd_use_tls">smtpd_use_tls</a>)</b>
- Opportunistic TLS: announce STARTTLS support to remote SMTP
+ Opportunistic TLS: announce STARTTLS support to remote SMTP
clients, but do not require that clients use TLS encryption.
<b><a href="postconf.5.html#tlsproxy_enforce_tls">tlsproxy_enforce_tls</a> ($<a href="postconf.5.html#smtpd_enforce_tls">smtpd_enforce_tls</a>)</b>
and require that clients use TLS encryption.
<b><a href="postconf.5.html#tlsproxy_client_use_tls">tlsproxy_client_use_tls</a> ($<a href="postconf.5.html#smtp_use_tls">smtp_use_tls</a>)</b>
- Opportunistic mode: use TLS when a remote server announces TLS
+ Opportunistic mode: use TLS when a remote server announces TLS
support.
<b><a href="postconf.5.html#tlsproxy_client_enforce_tls">tlsproxy_client_enforce_tls</a> ($<a href="postconf.5.html#smtp_enforce_tls">smtp_enforce_tls</a>)</b>
- Enforcement mode: require that SMTP servers use TLS encryption.
+ Enforcement mode: require that SMTP servers use TLS encryption.
<b>RESOURCE CONTROLS</b>
<b><a href="postconf.5.html#tlsproxy_watchdog_timeout">tlsproxy_watchdog_timeout</a> (10s)</b>
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
- The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
+ The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
figuration files.
<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
- A prefix that is prepended to the process name in syslog
+ A prefix that is prepended to the process name in syslog
records, so that, for example, "smtpd" becomes "prefix/smtpd".
Available in Postfix 3.3 and later:
The prioritized list of finite\-field Diffie\-Hellman ephemeral
(FFDHE) key exchange groups supported by the Postfix SMTP client and
server.
+.PP
+Available in Postfix version 3.9 and later:
+.IP "\fBtls_config_file (default)\fR"
+Optional configuration file with baseline OpenSSL settings.
+.IP "\fBtls_config_name (empty)\fR"
+The application name passed by Postfix to OpenSSL library
+initialization functions.
.SH "OBSOLETE STARTTLS CONTROLS"
.na
.nf
The prioritized list of finite\-field Diffie\-Hellman ephemeral
(FFDHE) key exchange groups supported by the Postfix SMTP client and
server.
+.PP
+Available in Postfix version 3.9 and later:
+.IP "\fBtls_config_file (default)\fR"
+Optional configuration file with baseline OpenSSL settings.
+.IP "\fBtls_config_name (empty)\fR"
+The application name passed by Postfix to OpenSSL library
+initialization functions.
.SH "OBSOLETE STARTTLS CONTROLS"
.na
.nf
The prioritized list of finite\-field Diffie\-Hellman ephemeral
(FFDHE) key exchange groups supported by the Postfix SMTP client and
server.
+.PP
+Available in Postfix version 3.9 and later:
+.IP "\fBtls_config_file (default)\fR"
+Optional configuration file with baseline OpenSSL settings.
+.IP "\fBtls_config_name (empty)\fR"
+The application name passed by Postfix to OpenSSL library
+initialization functions.
.SH "STARTTLS SERVER CONTROLS"
.na
.nf
* Patches change both the patchlevel and the release date. Snapshots have no
* patchlevel; they change the release date only.
*/
-#define MAIL_RELEASE_DATE "20230523"
+#define MAIL_RELEASE_DATE "20230524"
#define MAIL_VERSION_NUMBER "3.9"
#ifdef SNAPSHOT
/* The prioritized list of finite-field Diffie-Hellman ephemeral
/* (FFDHE) key exchange groups supported by the Postfix SMTP client and
/* server.
+/* .PP
+/* Available in Postfix version 3.9 and later:
+/* .IP "\fBtls_config_file (default)\fR"
+/* Optional configuration file with baseline OpenSSL settings.
+/* .IP "\fBtls_config_name (empty)\fR"
+/* The application name passed by Postfix to OpenSSL library
+/* initialization functions.
/* OBSOLETE STARTTLS CONTROLS
/* .ad
/* .fi
/* The prioritized list of finite-field Diffie-Hellman ephemeral
/* (FFDHE) key exchange groups supported by the Postfix SMTP client and
/* server.
+/* .PP
+/* Available in Postfix version 3.9 and later:
+/* .IP "\fBtls_config_file (default)\fR"
+/* Optional configuration file with baseline OpenSSL settings.
+/* .IP "\fBtls_config_name (empty)\fR"
+/* The application name passed by Postfix to OpenSSL library
+/* initialization functions.
/* OBSOLETE STARTTLS CONTROLS
/* .ad
/* .fi
#define TLS_CLIENT_INIT_ARGS(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
a10, a11, a12, a13, a14) \
- (((props)->a1), ((props)->a2), ((props)->a3), ((props)->a4), \
- ((props)->a5), ((props)->a6), ((props)->a7), ((props)->a8), \
- ((props)->a9), ((props)->a10), ((props)->a11), ((props)->a12), \
- ((props)->a13), ((props)->a14), (props))
+ (((props)->a1), ((props)->a2), ((props)->a3), \
+ ((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
+ ((props)->a8), ((props)->a9), ((props)->a10), ((props)->a11), \
+ ((props)->a12), ((props)->a13), ((props)->a14), (props))
#define TLS_CLIENT_INIT(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
a10, a11, a12, a13, a14) \
/*
* With OpenSSL 1.0.2 and later the client EECDH curve list becomes
* configurable with the preferred curve negotiated via the supported
- * curves extension. With OpenSSL 3.0 and TLS 1.3, the same applies to
- * the FFDHE groups which become part of a unified "groups" list.
+ * curves extension. With OpenSSL 3.0 and TLS 1.3, the same applies
+ * to the FFDHE groups which become part of a unified "groups" list.
*/
tls_auto_groups(client_ctx, var_tls_eecdh_auto, var_tls_ffdhe_auto);
static const char server_session_id_context[] = "Postfix/TLS";
#ifndef OPENSSL_NO_TLSEXT
-
/*
* We retain the cipher handle for the lifetime of the process.
*/
static const EVP_CIPHER *tkt_cipher;
-
#endif
#define GET_SID(s, v, lptr) ((v) = SSL_SESSION_get_id((s), (lptr)))
tls_tmp_dh(sni_ctx, 1);
/*
- * Enable EECDH if available, errors are not fatal, we just keep going
- * with any remaining key-exchange algorithms. With OpenSSL 3.0 and TLS
- * 1.3, the same applies to the FFDHE groups which become part of a
- * unified "groups" list.
+ * Enable EECDH if available, errors are not fatal, we just keep going with
+ * any remaining key-exchange algorithms. With OpenSSL 3.0 and TLS 1.3,
+ * the same applies to the FFDHE groups which become part of a unified
+ * "groups" list.
*/
tls_auto_groups(server_ctx, var_tls_eecdh_auto, var_tls_ffdhe_auto);
tls_auto_groups(sni_ctx, var_tls_eecdh_auto, var_tls_ffdhe_auto);
/* The prioritized list of finite-field Diffie-Hellman ephemeral
/* (FFDHE) key exchange groups supported by the Postfix SMTP client and
/* server.
+/* .PP
+/* Available in Postfix version 3.9 and later:
+/* .IP "\fBtls_config_file (default)\fR"
+/* Optional configuration file with baseline OpenSSL settings.
+/* .IP "\fBtls_config_name (empty)\fR"
+/* The application name passed by Postfix to OpenSSL library
+/* initialization functions.
/* STARTTLS SERVER CONTROLS
/* .ad
/* .fi
projects / thirdparty / postfix.git / commitdiff
