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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
commitb5896ba9f6047e7031e2bdee0622d543e11a6734 (patch)
treefd7b460593a2fee1be579bec5697e6d887ea3421 /html/postfix.1.html
parentInitial commit. (diff)
downloadpostfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.tar.xz
postfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.zip
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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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 <a href="master.8.html"><b>master</b>(8)</a> daemon running in the fore-
+ ground, and enable <a href="master.8.html"><b>master</b>(8)</a> "init" mode when running as PID 1.
+ This command 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>logrotate</b>
+ Rotate the logfile specified with $<a href="postconf.5.html#maillog_file">maillog_file</a>, by appending a
+ time-stamp suffix that is formatted according to $<a href="postconf.5.html#maillog_file_rotate_suffix">mail</a>-
+ <a href="postconf.5.html#maillog_file_rotate_suffix">log_file_rotate_suffix</a>, and by compressing the file with the
+ command specified with $<a href="postconf.5.html#maillog_file_compressor">maillog_file_compressor</a>. This will not
+ rotate /dev/* files.
+
+ This feature is available in Postfix 3.4 and later.
+
+ <b>tls</b> <i>subcommand</i>
+ Enable opportunistic TLS in the Postfix SMTP client or server,
+ and manage Postfix SMTP server TLS private keys and certifi-
+ cates. See <a href="postfix-tls.1.html">postfix-tls(1)</a> for documentation.
+
+ This feature is available in Postfix 3.1 and later.
+
+ <b>upgrade-configuration</b> [<i>name</i>=<i>value ...</i>]
+ Update the <a href="postconf.5.html"><b>main.cf</b></a> and <a href="master.5.html"><b>master.cf</b></a> files with information that
+ Postfix needs in order to run: add or update services, and add
+ or update configuration parameter settings.
+
+ Specify <i>name</i>=<i>value</i> to override and update specific <a href="postconf.5.html">main.cf</a> con-
+ figuration parameters.
+
+ This feature is available in Postfix 2.1 and later. With Post-
+ fix 2.0 and earlier, use "<b>$<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.
+
+ When the internal logging service is enabled (by setting a non-empty
+ <a href="postconf.5.html#maillog_file">maillog_file</a> parameter value) the <a href="postfix.1.html">postfix(1)</a> command exports settings
+ that are used by child processes before they have processed <a href="postconf.5.html">main.cf</a> or
+ command-line settings.
+
+ <b>POSTLOG_SERVICE</b>
+ The name of the public postlog service endpoint.
+
+ <b>POSTLOG_HOSTNAME</b>
+ The hostname to prepend to internal logging.
+
+<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.
+
+ Available in Postfix version 3.4 and later:
+
+ <b><a href="postconf.5.html#maillog_file">maillog_file</a> (empty)</b>
+ The name of an optional logfile that is written by the Postfix
+ <a href="postlogd.8.html"><b>postlogd</b>(8)</a> service.
+
+ <b><a href="postconf.5.html#maillog_file_compressor">maillog_file_compressor</a> (gzip)</b>
+ The program to run after rotating $<a href="postconf.5.html#maillog_file">maillog_file</a> with "postfix
+ logrotate".
+
+ <b><a href="postconf.5.html#maillog_file_prefixes">maillog_file_prefixes</a> (/var, /dev/stdout)</b>
+ A list of allowed prefixes for a <a href="postconf.5.html#maillog_file">maillog_file</a> value.
+
+ <b><a href="postconf.5.html#maillog_file_rotate_suffix">maillog_file_rotate_suffix</a> (%Y%m%d-%H%M%S)</b>
+ The format of the suffix to append to $<a href="postconf.5.html#maillog_file">maillog_file</a> while rotat-
+ ing the file with "postfix logrotate".
+
+ <b><a href="postconf.5.html#postlog_service_name">postlog_service_name</a> (postlog)</b>
+ The name of the <a href="postlogd.8.html"><b>postlogd</b>(8)</a> service entry in <a href="master.5.html">master.cf</a>.
+
+<b>FILES</b>
+ Prior to Postfix version 2.6, all of the following files were in <b>$<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="postlogd.8.html">postlogd(8)</a>, Postfix internal logging service
+ <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)
+</pre> </body> </html>