1<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" 2 "http://www.w3.org/TR/html4/loose.dtd"> 3<html> <head> 4<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> 5<title> Postfix manual - showq(8) </title> 6</head> <body> <pre> 7SHOWQ(8) SHOWQ(8) 8 9<b>NAME</b> 10 showq - list the Postfix mail queue 11 12<b>SYNOPSIS</b> 13 <b>showq</b> [generic Postfix daemon options] 14 15<b>DESCRIPTION</b> 16 The <a href="showq.8.html"><b>showq</b>(8)</a> daemon reports the Postfix mail queue status. It is the 17 program that emulates the sendmail `mailq' command. 18 19 The <a href="showq.8.html"><b>showq</b>(8)</a> daemon can also be run in stand-alone mode by the supe- 20 ruser. This mode of operation is used to emulate the `mailq' command 21 while the Postfix mail system is down. 22 23<b>SECURITY</b> 24 The <a href="showq.8.html"><b>showq</b>(8)</a> daemon can run in a chroot jail at fixed low privilege, 25 and takes no input from the client. Its service port is accessible to 26 local untrusted users, so the service can be susceptible to denial of 27 service attacks. 28 29<b>STANDARDS</b> 30 None. The <a href="showq.8.html"><b>showq</b>(8)</a> daemon does not interact with the outside world. 31 32<b>DIAGNOSTICS</b> 33 Problems and transactions are logged to <b>syslogd</b>(8). 34 35<b>CONFIGURATION PARAMETERS</b> 36 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 37 run for only a limited amount of time. Use the command "<b>postfix reload</b>" 38 to speed up a change. 39 40 The text below provides only a parameter summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for 41 more details including examples. 42 43 <b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b> 44 The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con- 45 figuration files. 46 47 <b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b> 48 How much time a Postfix daemon process may take to handle a 49 request before it is terminated by a built-in watchdog timer. 50 51 <b><a href="postconf.5.html#duplicate_filter_limit">duplicate_filter_limit</a> (1000)</b> 52 The maximal number of addresses remembered by the address dupli- 53 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 54 <a href="showq.8.html"><b>showq</b>(8)</a> queue displays. 55 56 <b><a href="postconf.5.html#empty_address_recipient">empty_address_recipient</a> (MAILER-DAEMON)</b> 57 The recipient of mail addressed to the null address. 58 59 <b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b> 60 The time limit for sending or receiving information over an 61 internal communication channel. 62 63 <b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b> 64 The maximum amount of time that an idle Postfix daemon process 65 waits for an incoming connection before terminating voluntarily. 66 67 <b><a href="postconf.5.html#max_use">max_use</a> (100)</b> 68 The maximal number of incoming connections that a Postfix daemon 69 process will service before terminating voluntarily. 70 71 <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b> 72 The process ID of a Postfix command or daemon process. 73 74 <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b> 75 The process name of a Postfix command or daemon process. 76 77 <b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b> 78 The location of the Postfix top-level queue directory. 79 80 <b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b> 81 The syslog facility of Postfix logging. 82 83 <b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b> 84 The mail system name that is prepended to the process name in 85 syslog records, so that "smtpd" becomes, for example, "post- 86 fix/smtpd". 87 88 Available in Postfix version 2.9 and later: 89 90 <b><a href="postconf.5.html#enable_long_queue_ids">enable_long_queue_ids</a> (no)</b> 91 Enable long, non-repeating, queue IDs (queue file names). 92 93<b>FILES</b> 94 /var/spool/postfix, queue directories 95 96<b>SEE ALSO</b> 97 <a href="pickup.8.html">pickup(8)</a>, local mail pickup service 98 <a href="cleanup.8.html">cleanup(8)</a>, canonicalize and enqueue mail 99 <a href="qmgr.8.html">qmgr(8)</a>, queue manager 100 <a href="postconf.5.html">postconf(5)</a>, configuration parameters 101 <a href="master.8.html">master(8)</a>, process manager 102 syslogd(8), system logging 103 104<b>LICENSE</b> 105 The Secure Mailer license must be distributed with this software. 106 107<b>AUTHOR(S)</b> 108 Wietse Venema 109 IBM T.J. Watson Research 110 P.O. Box 704 111 Yorktown Heights, NY 10598, USA 112 113 SHOWQ(8) 114</pre> </body> </html> 115