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<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html> <head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<title> Postfix manual - postfix(1) </title>
</head> <body> <pre>
POSTFIX(1)                                                          POSTFIX(1)

<b>NAME</b>
       postfix - Postfix control program

<b>SYNOPSIS</b>
       <b>postfix</b> [<b>-Dv</b>] [<b>-c</b> <i>config</i><b>_</b><i>dir</i>] <i>command</i>

<b>DESCRIPTION</b>
       This  command  is  reserved  for the superuser. To submit mail, use the
       Postfix <a href="sendmail.1.html"><b>sendmail</b>(1)</a> command.

       The <a href="postfix.1.html"><b>postfix</b>(1)</a> command controls the operation of the Postfix mail  sys-
       tem:  start  or stop the <a href="master.8.html"><b>master</b>(8)</a> daemon, do a health check, and other
       maintenance.

       By default, the <a href="postfix.1.html"><b>postfix</b>(1)</a> command sets up a  standardized  environment
       and runs the <b>postfix-script</b> shell script to do the actual work.

       However,  when  support  for  multiple Postfix instances is configured,
       <a href="postfix.1.html"><b>postfix</b>(1)</a> executes the command specified with the <b><a href="postconf.5.html#multi_instance_wrapper">multi_instance_wrap</a>-</b>
       <b><a href="postconf.5.html#multi_instance_wrapper">per</a></b> configuration parameter.  This command will execute the <i>command</i> for
       each applicable Postfix instance.

       The following commands are implemented:

       <b>check</b>  Warn about bad directory/file ownership or permissions, and cre-
              ate missing directories.

       <b>start</b>  Start  the Postfix mail system. This also runs the configuration
              check described above.

       <b>start-fg</b>
              Like <b>start</b>, but keep the master  daemon  running  in  the  fore-
              ground.  This  requires  that multi-instance support is disabled
              (i.e. the <a href="postconf.5.html#multi_instance_directories">multi_instance_directories</a>  parameter  value  must  be
              empty).  When running Postfix inside a container, mount the con-
              tainer host's /dev/log socket  inside  the  container  (example:
              "docker  run  -v /dev/log:/dev/log ...")  and specify a distinct
              Postfix "<a href="postconf.5.html#syslog_name">syslog_name</a>" prefix that identifies  logging  from  the
              Postfix instance.

       <b>stop</b>   Stop the Postfix mail system in an orderly fashion. If possible,
              running processes are allowed to  terminate  at  their  earliest
              convenience.

              Note:  in  order to refresh the Postfix mail system after a con-
              figuration change, do not use the <b>start</b>  and  <b>stop</b>  commands  in
              succession. Use the <b>reload</b> command instead.

       <b>abort</b>  Stop  the  Postfix  mail  system abruptly. Running processes are
              signaled to stop immediately.

       <b>flush</b>  Force delivery: attempt to deliver every message in the deferred
              mail queue. Normally, attempts to deliver delayed mail happen at
              regular intervals,  the  interval  doubling  after  each  failed
              attempt.

              Warning:  flushing  undeliverable mail frequently will result in
              poor delivery performance of all other mail.

       <b>reload</b> Re-read configuration  files.  Running  processes  terminate  at
              their earliest convenience.

       <b>status</b> Indicate if the Postfix mail system is currently running.

       <b>set-permissions</b> [<i>name</i>=<i>value ...</i>]
              Set  the  ownership and permissions of Postfix related files and
              directories, as specified in the <b>postfix-files</b> file.

              Specify <i>name</i>=<i>value</i> to override and update specific <a href="postconf.5.html">main.cf</a>  con-
              figuration  parameters.  Use  this,  for  example, to change the
              <b><a href="postconf.5.html#mail_owner">mail_owner</a></b> or <b><a href="postconf.5.html#setgid_group">setgid_group</a></b>  setting  for  an  already  installed
              Postfix system.

              This  feature is available in Postfix 2.1 and later.  With Post-
              fix  2.0  and   earlier,   use   "<b>$<a href="postconf.5.html#config_directory">config_directory</a>/post-install</b>
              <b>set-permissions</b>".

       <b>tls</b> <i>subcommand</i>
              Enable  opportunistic  TLS in the Postfix SMTP client or server,
              and manage Postfix SMTP server TLS  private  keys  and  certifi-
              cates.  See <a href="postfix-tls.1.html">postfix-tls(1)</a> for documentation.

              This feature is available in Postfix 3.1 and later.

       <b>upgrade-configuration</b> [<i>name</i>=<i>value ...</i>]
              Update  the  <a href="postconf.5.html"><b>main.cf</b></a>  and  <a href="master.5.html"><b>master.cf</b></a> files with information that
              Postfix needs in order to run: add or update services,  and  add
              or update configuration parameter settings.

              Specify  <i>name</i>=<i>value</i> to override and update specific <a href="postconf.5.html">main.cf</a> con-
              figuration parameters.

              This feature is available in Postfix 2.1 and later.  With  Post-
              fix   2.0   and   earlier,  use  "<b>$<a href="postconf.5.html#config_directory">config_directory</a>/post-install</b>
              <b>upgrade-configuration</b>".

       The following options are implemented:

       <b>-c</b> <i>config</i><b>_</b><i>dir</i>
              Read the <a href="postconf.5.html"><b>main.cf</b></a> and <a href="master.5.html"><b>master.cf</b></a> configuration files in the  named
              directory  instead  of the default configuration directory.  Use
              this to distinguish between multiple Postfix  instances  on  the
              same host.

              With  Postfix  2.6  and later, this option forces the <a href="postfix.1.html">postfix(1)</a>
              command to operate on the specified Postfix instance only.  This
              behavior  is  inherited  by  <a href="postfix.1.html">postfix(1)</a>  commands  that run as a
              descendant of the current process.

       <b>-D</b> (with <b>postfix start</b> only)
              Run each Postfix daemon under control of a debugger as specified
              via the <b><a href="postconf.5.html#debugger_command">debugger_command</a></b> configuration parameter.

       <b>-v</b>     Enable  verbose  logging  for  debugging  purposes.  Multiple <b>-v</b>
              options make the software increasingly verbose.

<b>ENVIRONMENT</b>
       The <a href="postfix.1.html"><b>postfix</b>(1)</a> command  exports  the  following  environment  variables
       before executing the <b>postfix-script</b> file:

       <b>MAIL_CONFIG</b>
              This is set when the -c command-line option is present.

              With Postfix 2.6 and later, this environment variable forces the
              <a href="postfix.1.html">postfix(1)</a> command to operate on the specified Postfix  instance
              only.   This  behavior  is inherited by <a href="postfix.1.html">postfix(1)</a> commands that
              run as a descendant of the current process.

       <b>MAIL_VERBOSE</b>
              This is set when the -v command-line option is present.

       <b>MAIL_DEBUG</b>
              This is set when the -D command-line option is present.

<b>CONFIGURATION PARAMETERS</b>
       The following <a href="postconf.5.html"><b>main.cf</b></a> configuration parameters are exported as environ-
       ment variables with the same names:

       <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-
              figuration files.

       <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#daemon_directory">daemon_directory</a> (see 'postconf -d' output)</b>
              The directory with Postfix support programs and daemon programs.

       <b><a href="postconf.5.html#html_directory">html_directory</a> (see 'postconf -d' output)</b>
              The  location  of Postfix HTML files that describe how to build,
              configure or operate a specific Postfix subsystem or feature.

       <b><a href="postconf.5.html#mail_owner">mail_owner</a> (postfix)</b>
              The UNIX system account that owns the  Postfix  queue  and  most
              Postfix daemon processes.

       <b><a href="postconf.5.html#mailq_path">mailq_path</a> (see 'postconf -d' output)</b>
              Sendmail  compatibility feature that specifies where the Postfix
              <a href="mailq.1.html"><b>mailq</b>(1)</a> command is installed.

       <b><a href="postconf.5.html#manpage_directory">manpage_directory</a> (see 'postconf -d' output)</b>
              Where the Postfix manual pages are installed.

       <b><a href="postconf.5.html#newaliases_path">newaliases_path</a> (see 'postconf -d' output)</b>
              Sendmail compatibility feature that specifies  the  location  of
              the <a href="newaliases.1.html"><b>newaliases</b>(1)</a> command.

       <b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
              The location of the Postfix top-level queue directory.

       <b><a href="postconf.5.html#readme_directory">readme_directory</a> (see 'postconf -d' output)</b>
              The location of Postfix README files that describe how to build,
              configure or operate a specific Postfix subsystem or feature.

       <b><a href="postconf.5.html#sendmail_path">sendmail_path</a> (see 'postconf -d' output)</b>
              A Sendmail compatibility feature that specifies the location  of
              the Postfix <a href="sendmail.1.html"><b>sendmail</b>(1)</a> command.

       <b><a href="postconf.5.html#setgid_group">setgid_group</a> (postdrop)</b>
              The   group   ownership  of  set-gid  Postfix  commands  and  of
              group-writable Postfix directories.

       Available in Postfix version 2.5 and later:

       <b><a href="postconf.5.html#data_directory">data_directory</a> (see 'postconf -d' output)</b>
              The directory with Postfix-writable  data  files  (for  example:
              caches, pseudo-random numbers).

       Available in Postfix version 3.0 and later:

       <b><a href="postconf.5.html#meta_directory">meta_directory</a> (see 'postconf -d' output)</b>
              The  location of non-executable files that are shared among mul-
              tiple Postfix instances, such as postfix-files,  dynamicmaps.cf,
              and  the  multi-instance  template  files <a href="postconf.5.html">main.cf</a>.proto and <a href="master.5.html">mas-
              ter.cf</a>.proto.

       <b><a href="postconf.5.html#shlib_directory">shlib_directory</a> (see 'postconf -d' output)</b>
              The location of Postfix dynamically-linked  libraries  (libpost-
              fix-*.so),  and the default location of Postfix database plugins
              (postfix-*.so) that have  a  relative  pathname  in  the  dynam-
              icmaps.cf file.

       Available in Postfix version 3.1 and later:

       <b><a href="postconf.5.html#openssl_path">openssl_path</a> (openssl)</b>
              The location of the OpenSSL command line program <b>openssl</b>(1).

       Other configuration parameters:

       <b><a href="postconf.5.html#import_environment">import_environment</a> (see 'postconf -d' output)</b>
              The  list  of  environment  parameters that a privileged Postfix
              process will  import  from  a  non-Postfix  parent  process,  or
              name=value environment overrides.

       <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
              records, so that, for example, "smtpd" becomes "prefix/smtpd".

       Available in Postfix version 2.6 and later:

       <b><a href="postconf.5.html#multi_instance_directories">multi_instance_directories</a> (empty)</b>
              An optional list of non-default Postfix  configuration  directo-
              ries;  these  directories belong to additional Postfix instances
              that share the Postfix executable files and  documentation  with
              the  default  Postfix  instance,  and that are started, stopped,
              etc., together with the default Postfix instance.

       <b><a href="postconf.5.html#multi_instance_wrapper">multi_instance_wrapper</a> (empty)</b>
              The pathname of a multi-instance manager command that the  <a href="postfix.1.html"><b>post-</b></a>
              <a href="postfix.1.html"><b>fix</b>(1)</a>   command  invokes  when  the  <a href="postconf.5.html#multi_instance_directories">multi_instance_directories</a>
              parameter value is non-empty.

       <b><a href="postconf.5.html#multi_instance_group">multi_instance_group</a> (empty)</b>
              The optional instance group name of this Postfix instance.

       <b><a href="postconf.5.html#multi_instance_name">multi_instance_name</a> (empty)</b>
              The optional instance name of this Postfix instance.

       <b><a href="postconf.5.html#multi_instance_enable">multi_instance_enable</a> (no)</b>
              Allow this Postfix instance to be started, stopped, etc.,  by  a
              multi-instance manager.

<b>FILES</b>
       Prior  to Postfix version 2.6, all of the following files were in <b>$<a href="postconf.5.html#config_directory">con</a>-</b>
       <b><a href="postconf.5.html#config_directory">fig_directory</a></b>. Some files are now in <b>$<a href="postconf.5.html#daemon_directory">daemon_directory</a></b> so that they can
       be shared among multiple instances that run the same Postfix version.

       Use  the command "<b>postconf <a href="postconf.5.html#config_directory">config_directory</a></b>" or "<b>postconf <a href="postconf.5.html#daemon_directory">daemon_direc</a>-</b>
       <b><a href="postconf.5.html#daemon_directory">tory</a></b>" to expand the names into their actual values.

       $<a href="postconf.5.html#config_directory">config_directory</a>/<a href="postconf.5.html">main.cf</a>, Postfix configuration parameters
       $<a href="postconf.5.html#config_directory">config_directory</a>/<a href="master.5.html">master.cf</a>, Postfix daemon processes
       $<a href="postconf.5.html#daemon_directory">daemon_directory</a>/postfix-files, file/directory permissions
       $<a href="postconf.5.html#daemon_directory">daemon_directory</a>/postfix-script, administrative commands
       $<a href="postconf.5.html#daemon_directory">daemon_directory</a>/post-install, post-installation configuration
       $<a href="postconf.5.html#daemon_directory">daemon_directory</a>/dynamicmaps.cf, plug-in database clients

<b>SEE ALSO</b>
       Commands:
       <a href="postalias.1.html">postalias(1)</a>, create/update/query alias database
       <a href="postcat.1.html">postcat(1)</a>, examine Postfix queue file
       <a href="postconf.1.html">postconf(1)</a>, Postfix configuration utility
       <a href="postfix.1.html">postfix(1)</a>, Postfix control program
       <a href="postfix-tls.1.html">postfix-tls(1)</a>, Postfix TLS management
       <a href="postkick.1.html">postkick(1)</a>, trigger Postfix daemon
       <a href="postlock.1.html">postlock(1)</a>, Postfix-compatible locking
       <a href="postlog.1.html">postlog(1)</a>, Postfix-compatible logging
       <a href="postmap.1.html">postmap(1)</a>, Postfix lookup table manager
       <a href="postmulti.1.html">postmulti(1)</a>, Postfix multi-instance manager
       <a href="postqueue.1.html">postqueue(1)</a>, Postfix mail queue control
       <a href="postsuper.1.html">postsuper(1)</a>, Postfix housekeeping
       <a href="mailq.1.html">mailq(1)</a>, Sendmail compatibility interface
       <a href="newaliases.1.html">newaliases(1)</a>, Sendmail compatibility interface
       <a href="sendmail.1.html">sendmail(1)</a>, Sendmail compatibility interface

       Postfix configuration:
       <a href="bounce.5.html">bounce(5)</a>, Postfix bounce message templates
       <a href="master.5.html">master(5)</a>, Postfix <a href="master.5.html">master.cf</a> file syntax
       <a href="postconf.5.html">postconf(5)</a>, Postfix <a href="postconf.5.html">main.cf</a> file syntax
       <a href="postfix-wrapper.5.html">postfix-wrapper(5)</a>, Postfix multi-instance API

       Table-driven mechanisms:
       <a href="access.5.html">access(5)</a>, Postfix SMTP access control table
       <a href="aliases.5.html">aliases(5)</a>, Postfix alias database
       <a href="canonical.5.html">canonical(5)</a>, Postfix input address rewriting
       <a href="generic.5.html">generic(5)</a>, Postfix output address rewriting
       <a href="header_checks.5.html">header_checks(5)</a>, <a href="header_checks.5.html">body_checks(5)</a>, Postfix content inspection
       <a href="relocated.5.html">relocated(5)</a>, Users that have moved
       <a href="transport.5.html">transport(5)</a>, Postfix routing table
       <a href="virtual.5.html">virtual(5)</a>, Postfix virtual aliasing

       Table lookup mechanisms:
       <a href="cidr_table.5.html">cidr_table(5)</a>, Associate CIDR pattern with value
       <a href="ldap_table.5.html">ldap_table(5)</a>, Postfix LDAP client
       <a href="lmdb_table.5.html">lmdb_table(5)</a>, Postfix LMDB database driver
       <a href="memcache_table.5.html">memcache_table(5)</a>, Postfix memcache client
       <a href="mysql_table.5.html">mysql_table(5)</a>, Postfix MYSQL client
       <a href="nisplus_table.5.html">nisplus_table(5)</a>, Postfix NIS+ client
       <a href="pcre_table.5.html">pcre_table(5)</a>, Associate PCRE pattern with value
       <a href="pgsql_table.5.html">pgsql_table(5)</a>, Postfix PostgreSQL client
       <a href="regexp_table.5.html">regexp_table(5)</a>, Associate POSIX regexp pattern with value
       <a href="socketmap_table.5.html">socketmap_table(5)</a>, Postfix socketmap client
       <a href="sqlite_table.5.html">sqlite_table(5)</a>, Postfix SQLite database driver
       <a href="tcp_table.5.html">tcp_table(5)</a>, Postfix client-server table lookup

       Daemon processes:
       <a href="anvil.8.html">anvil(8)</a>, Postfix connection/rate limiting
       <a href="bounce.8.html">bounce(8)</a>, <a href="defer.8.html">defer(8)</a>, <a href="trace.8.html">trace(8)</a>, Delivery status reports
       <a href="cleanup.8.html">cleanup(8)</a>, canonicalize and enqueue message
       <a href="discard.8.html">discard(8)</a>, Postfix discard delivery agent
       <a href="dnsblog.8.html">dnsblog(8)</a>, DNS black/whitelist logger
       <a href="error.8.html">error(8)</a>, Postfix error delivery agent
       <a href="flush.8.html">flush(8)</a>, Postfix fast ETRN service
       <a href="local.8.html">local(8)</a>, Postfix local delivery agent
       <a href="master.8.html">master(8)</a>, Postfix master daemon
       <a href="qmgr.8.html">oqmgr(8)</a>, old Postfix queue manager
       <a href="pickup.8.html">pickup(8)</a>, Postfix local mail pickup
       <a href="pipe.8.html">pipe(8)</a>, deliver mail to non-Postfix command
       <a href="postscreen.8.html">postscreen(8)</a>, Postfix zombie blocker
       <a href="proxymap.8.html">proxymap(8)</a>, Postfix lookup table proxy server
       <a href="qmgr.8.html">qmgr(8)</a>, Postfix queue manager
       <a href="qmqpd.8.html">qmqpd(8)</a>, Postfix QMQP server
       <a href="scache.8.html">scache(8)</a>, Postfix connection cache manager
       <a href="showq.8.html">showq(8)</a>, list Postfix mail queue
       <a href="smtp.8.html">smtp(8)</a>, <a href="lmtp.8.html">lmtp(8)</a>, Postfix SMTP+LMTP client
       <a href="smtpd.8.html">smtpd(8)</a>, Postfix SMTP server
       <a href="spawn.8.html">spawn(8)</a>, run non-Postfix server
       <a href="tlsmgr.8.html">tlsmgr(8)</a>, Postfix TLS cache and randomness manager
       <a href="tlsproxy.8.html">tlsproxy(8)</a>, Postfix TLS proxy server
       <a href="trivial-rewrite.8.html">trivial-rewrite(8)</a>, Postfix address rewriting
       <a href="verify.8.html">verify(8)</a>, Postfix address verification
       <a href="virtual.8.html">virtual(8)</a>, Postfix virtual delivery agent

       Other:
       syslogd(8), system logging

<b>README FILES</b>
       <a href="OVERVIEW.html">OVERVIEW</a>, overview of Postfix commands and processes
       <a href="BASIC_CONFIGURATION_README.html">BASIC_CONFIGURATION_README</a>, Postfix basic configuration
       <a href="ADDRESS_REWRITING_README.html">ADDRESS_REWRITING_README</a>, Postfix address rewriting
       <a href="SMTPD_ACCESS_README.html">SMTPD_ACCESS_README</a>, SMTP relay/access control
       <a href="CONTENT_INSPECTION_README.html">CONTENT_INSPECTION_README</a>, Postfix content inspection
       <a href="QSHAPE_README.html">QSHAPE_README</a>, Postfix queue analysis

<b>LICENSE</b>
       The Secure Mailer license must be distributed with this software.

<b>AUTHOR(S)</b>
       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA

       Wietse Venema
       Google, Inc.
       111 8th Avenue
       New York, NY 10011, USA

       TLS support by:
       Lutz Jaenicke
       Brandenburg University of Technology
       Cottbus, Germany

       Victor Duchovni
       Morgan Stanley

       SASL support originally by:
       Till Franke
       SuSE Rhein/Main AG
       65760 Eschborn, Germany

       LMTP support originally by:
       Philip A. Prindeville
       Mirapoint, Inc.
       USA.

       Amos Gouaux
       University of Texas at Dallas
       P.O. Box 830688, MC34
       Richardson, TX 75083, USA

       IPv6 support originally by:
       Mark Huizer, Eindhoven University, The Netherlands
       Jun-ichiro 'itojun' Hagino, KAME project, Japan
       The Linux PLD project
       Dean Strik, Eindhoven University, The Netherlands

                                                                    POSTFIX(1)
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