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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.
It is the program that emulates the sendmail `mailq' com-
mand.
The <a href="showq.8.html"><b>showq</b>(8)</a> daemon can also be run in stand-alone mode by
the superuser. 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 ser-
vice 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 out-
side world.
<b>DIAGNOSTICS</b>
Problems and transactions are logged to <b>syslogd</b>(8).
<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> configuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
How much time a Postfix daemon process may take to
handle a request before it is terminated by a
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 duplicate filter for <a href="aliases.5.html"><b>aliases</b>(5)</a> or <a href="virtual.5.html"><b>vir-</b></a>
<a href="virtual.5.html"><b>tual</b>(5)</a> alias expansion, or for <a href="showq.8.html"><b>showq</b>(8)</a> queue dis-
plays.
<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 termi-
nating 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 direc-
tory.
<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
The mail system name that is prepended to the
process name in syslog records, so that "smtpd"
becomes, for example, "postfix/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).
<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
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
SHOWQ(8)
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