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<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
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<title> Postfix manual - showq(8) </title>
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SHOWQ(8)                                                              SHOWQ(8)

<b>NAME</b>
       showq - list the Postfix mail queue

<b>SYNOPSIS</b>
       <b>showq</b> [generic Postfix daemon options]

<b>DESCRIPTION</b>
       The  <a href="showq.8.html"><b>showq</b>(8)</a> daemon reports the Postfix mail queue status.  The output
       is meant to be formatted by the <a href="postqueue.1.html">postqueue(1)</a> command,  as  it  emulates
       the Sendmail `mailq' command.

       The  <a href="showq.8.html"><b>showq</b>(8)</a>  daemon  can also be run in stand-alone mode by the supe-
       ruser. This mode of operation is used to emulate  the  `mailq'  command
       while the Postfix mail system is down.

<b>SECURITY</b>
       The  <a href="showq.8.html"><b>showq</b>(8)</a>  daemon  can run in a chroot jail at fixed low privilege,
       and takes no input from the client. Its service port is  accessible  to
       local  untrusted  users, so the service can be susceptible to denial of
       service attacks.

<b>STANDARDS</b>
       None. The <a href="showq.8.html"><b>showq</b>(8)</a> daemon does not interact with the outside world.

<b>DIAGNOSTICS</b>
       Problems and transactions are logged to <b>syslogd</b>(8) or <a href="postlogd.8.html"><b>postlogd</b>(8)</a>.

<b>CONFIGURATION PARAMETERS</b>
       Changes to <a href="postconf.5.html"><b>main.cf</b></a> are picked up automatically  as  <a href="showq.8.html"><b>showq</b>(8)</a>  processes
       run for only a limited amount of time. Use the command "<b>postfix reload</b>"
       to speed up a change.

       The text below provides only a parameter summary. See  <a href="postconf.5.html"><b>postconf</b>(5)</a>  for
       more details including examples.

       <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#daemon_timeout">daemon_timeout</a> (18000s)</b>
              How much time a Postfix daemon process  may  take  to  handle  a
              request before it is terminated by a built-in watchdog timer.

       <b><a href="postconf.5.html#duplicate_filter_limit">duplicate_filter_limit</a> (1000)</b>
              The maximal number of addresses remembered by the address dupli-
              cate filter for <a href="aliases.5.html"><b>aliases</b>(5)</a> or <a href="virtual.5.html"><b>virtual</b>(5)</a> alias expansion, or for
              <a href="showq.8.html"><b>showq</b>(8)</a> queue displays.

       <b><a href="postconf.5.html#empty_address_recipient">empty_address_recipient</a> (MAILER-DAEMON)</b>
              The recipient of mail addressed to the null address.

       <b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
              The  time  limit  for  sending  or receiving information over an
              internal communication channel.

       <b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
              The maximum amount of time that an idle Postfix  daemon  process
              waits for an incoming connection before terminating voluntarily.

       <b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
              The maximal number of incoming connections that a Postfix daemon
              process will service before terminating voluntarily.

       <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
              The process ID of a Postfix command or daemon process.

       <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
              The process name of a Postfix command or daemon process.

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

       <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 2.9 and later:

       <b><a href="postconf.5.html#enable_long_queue_ids">enable_long_queue_ids</a> (no)</b>
              Enable long, non-repeating, queue IDs (queue file names).

       Available in Postfix 3.3 and later:

       <b><a href="postconf.5.html#service_name">service_name</a> (read-only)</b>
              The <a href="master.5.html">master.cf</a> service name of a Postfix daemon process.

<b>FILES</b>
       /var/spool/postfix, queue directories

<b>SEE ALSO</b>
       <a href="pickup.8.html">pickup(8)</a>, local mail pickup service
       <a href="cleanup.8.html">cleanup(8)</a>, canonicalize and enqueue mail
       <a href="qmgr.8.html">qmgr(8)</a>, queue manager
       <a href="postconf.5.html">postconf(5)</a>, configuration parameters
       <a href="master.8.html">master(8)</a>, process manager
       <a href="postlogd.8.html">postlogd(8)</a>, Postfix logging
       syslogd(8), system logging

<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

                                                                      SHOWQ(8)
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