1 <!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" 2 "https://www.w3.org/TR/html4/loose.dtd"> 3 <html> <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5 <link rel='stylesheet' type='text/css' href='postfix-doc.css'> 6 <title> Postfix manual - showq(8) </title> 7 </head> <body> <pre> 8 SHOWQ(8) SHOWQ(8) 9 10 <b><a name="name">NAME</a></b> 11 showq - list the Postfix mail queue 12 13 <b><a name="synopsis">SYNOPSIS</a></b> 14 <b>showq</b> [generic Postfix daemon options] 15 16 <b><a name="description">DESCRIPTION</a></b> 17 The <a href="showq.8.html"><b>showq</b>(8)</a> daemon reports the Postfix mail queue status. The output 18 is meant to be formatted by the <a href="postqueue.1.html">postqueue(1)</a> command, as it emulates 19 the Sendmail `mailq' command. 20 21 The <a href="showq.8.html"><b>showq</b>(8)</a> daemon can also be run in stand-alone mode by the supe- 22 ruser. This mode of operation is used to emulate the `mailq' command 23 while the Postfix mail system is down. 24 25 <b><a name="security">SECURITY</a></b> 26 The <a href="showq.8.html"><b>showq</b>(8)</a> daemon can run in a chroot jail at fixed low privilege, 27 and takes no input from the client. Its service port is accessible to 28 local untrusted users, so the service can be susceptible to denial of 29 service attacks. 30 31 <b><a name="standards">STANDARDS</a></b> 32 None. The <a href="showq.8.html"><b>showq</b>(8)</a> daemon does not interact with the outside world. 33 34 <b><a name="diagnostics">DIAGNOSTICS</a></b> 35 Problems and transactions are logged to <b>syslogd</b>(8) or <a href="postlogd.8.html"><b>postlogd</b>(8)</a>. 36 37 <b><a name="configuration_parameters">CONFIGURATION PARAMETERS</a></b> 38 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 39 run for only a limited amount of time. Use the command "<b>postfix reload</b>" 40 to speed up a change. 41 42 The text below provides only a parameter summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for 43 more details including examples. 44 45 <b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b> 46 The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con- 47 figuration files. 48 49 <b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b> 50 How much time a Postfix daemon process may take to handle a 51 request before it is terminated by a built-in watchdog timer. 52 53 <b><a href="postconf.5.html#duplicate_filter_limit">duplicate_filter_limit</a> (1000)</b> 54 The maximal number of addresses remembered by the address dupli- 55 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 56 <a href="showq.8.html"><b>showq</b>(8)</a> queue displays. 57 58 <b><a href="postconf.5.html#empty_address_recipient">empty_address_recipient</a> (MAILER-DAEMON)</b> 59 The recipient of mail addressed to the null address. 60 61 <b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b> 62 The time limit for sending or receiving information over an 63 internal communication channel. 64 65 <b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b> 66 The maximum amount of time that an idle Postfix daemon process 67 waits for an incoming connection before terminating voluntarily. 68 69 <b><a href="postconf.5.html#max_use">max_use</a> (100)</b> 70 The maximal number of incoming connections that a Postfix daemon 71 process will service before terminating voluntarily. 72 73 <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b> 74 The process ID of a Postfix command or daemon process. 75 76 <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b> 77 The process name of a Postfix command or daemon process. 78 79 <b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b> 80 The location of the Postfix top-level queue directory. 81 82 <b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b> 83 The syslog facility of Postfix logging. 84 85 <b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b> 86 A prefix that is prepended to the process name in syslog 87 records, so that, for example, "smtpd" becomes "prefix/smtpd". 88 89 Available in Postfix version 2.9 and later: 90 91 <b><a href="postconf.5.html#enable_long_queue_ids">enable_long_queue_ids</a> (no)</b> 92 Enable long, non-repeating, queue IDs (queue file names). 93 94 Available in Postfix 3.3 and later: 95 96 <b><a href="postconf.5.html#service_name">service_name</a> (read-only)</b> 97 The <a href="master.5.html">master.cf</a> service name of a Postfix daemon process. 98 99 <b><a name="files">FILES</a></b> 100 /var/spool/postfix, queue directories 101 102 <b><a name="see_also">SEE ALSO</a></b> 103 <a href="pickup.8.html">pickup(8)</a>, local mail pickup service 104 <a href="cleanup.8.html">cleanup(8)</a>, canonicalize and enqueue mail 105 <a href="qmgr.8.html">qmgr(8)</a>, queue manager 106 <a href="postconf.5.html">postconf(5)</a>, configuration parameters 107 <a href="master.8.html">master(8)</a>, process manager 108 <a href="postlogd.8.html">postlogd(8)</a>, Postfix logging 109 syslogd(8), system logging 110 111 <b><a name="license">LICENSE</a></b> 112 The Secure Mailer license must be distributed with this software. 113 114 <b>AUTHOR(S)</b> 115 Wietse Venema 116 IBM T.J. Watson Research 117 P.O. Box 704 118 Yorktown Heights, NY 10598, USA 119 120 Wietse Venema 121 Google, Inc. 122 111 8th Avenue 123 New York, NY 10011, USA 124 125 SHOWQ(8) 126 </pre> </body> </html> 127
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