{
    "mode": "man",
    "parameter": "showq",
    "section": "8postfix",
    "url": "https://www.chedong.com/phpMan.php/man/showq/8postfix/json",
    "generated": "2026-06-14T00:15:51Z",
    "synopsis": "showq [generic Postfix daemon options]",
    "sections": {
        "NAME": {
            "content": "showq - list the Postfix mail queue\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "showq [generic Postfix daemon options]\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "The showq(8) daemon reports the Postfix mail queue status.  The output is meant to be format‐\nted by the postqueue(1) command, as it emulates the Sendmail `mailq' command.\n\nThe showq(8) daemon can also be run in stand-alone mode by the superuser. This mode of opera‐\ntion is used to emulate the `mailq' command while the Postfix mail system is down.\n",
            "subsections": []
        },
        "SECURITY": {
            "content": "The  showq(8) daemon can run in a chroot jail at fixed low privilege, and takes no input from\nthe client. Its service port is accessible to local untrusted users, so the  service  can  be\nsusceptible to denial of service attacks.\n",
            "subsections": []
        },
        "STANDARDS": {
            "content": "None. The showq(8) daemon does not interact with the outside world.\n",
            "subsections": []
        },
        "DIAGNOSTICS": {
            "content": "Problems and transactions are logged to syslogd(8) or postlogd(8).\n",
            "subsections": []
        },
        "CONFIGURATION PARAMETERS": {
            "content": "Changes  to  main.cf are picked up automatically as showq(8) processes run for only a limited\namount of time. Use the command \"postfix reload\" to speed up a change.\n\nThe text below provides only a parameter summary. See postconf(5) for more details  including\nexamples.\n\nconfigdirectory (see 'postconf -d' output)\nThe default location of the Postfix main.cf and master.cf configuration files.\n\ndaemontimeout (18000s)\nHow  much time a Postfix daemon process may take to handle a request before it is ter‐\nminated by a built-in watchdog timer.\n\nduplicatefilterlimit (1000)\nThe maximal number of  addresses  remembered  by  the  address  duplicate  filter  for\naliases(5) or virtual(5) alias expansion, or for showq(8) queue displays.\n\nemptyaddressrecipient (MAILER-DAEMON)\nThe recipient of mail addressed to the null address.\n\nipctimeout (3600s)\nThe  time  limit  for  sending or receiving information over an internal communication\nchannel.\n\nmaxidle (100s)\nThe maximum amount of time that an idle Postfix daemon process waits for  an  incoming\nconnection before terminating voluntarily.\n\nmaxuse (100)\nThe  maximal number of incoming connections that a Postfix daemon process will service\nbefore terminating voluntarily.\n\nprocessid (read-only)\nThe process ID of a Postfix command or daemon process.\n\nprocessname (read-only)\nThe process name of a Postfix command or daemon process.\n\nqueuedirectory (see 'postconf -d' output)\nThe location of the Postfix top-level queue directory.\n\nsyslogfacility (mail)\nThe syslog facility of Postfix logging.\n\nsyslogname (see 'postconf -d' output)\nA prefix that is prepended to the process name in syslog records, so that,  for  exam‐\nple, \"smtpd\" becomes \"prefix/smtpd\".\n\nAvailable in Postfix version 2.9 and later:\n\nenablelongqueueids (no)\nEnable long, non-repeating, queue IDs (queue file names).\n\nAvailable in Postfix 3.3 and later:\n\nservicename (read-only)\nThe master.cf service name of a Postfix daemon process.\n",
            "subsections": []
        },
        "FILES": {
            "content": "/var/spool/postfix, queue directories\n",
            "subsections": []
        },
        "SEE ALSO": {
            "content": "pickup(8), local mail pickup service\ncleanup(8), canonicalize and enqueue mail\nqmgr(8), queue manager\npostconf(5), configuration parameters\nmaster(8), process manager\npostlogd(8), Postfix logging\nsyslogd(8), system logging\n",
            "subsections": []
        },
        "LICENSE": {
            "content": "The Secure Mailer license must be distributed with this software.\n\nAUTHOR(S)\nWietse Venema\nIBM T.J. Watson Research\nP.O. Box 704\nYorktown Heights, NY 10598, USA\n\nWietse Venema\nGoogle, Inc.\n111 8th Avenue\nNew York, NY 10011, USA\n\n\n\nSHOWQ(8postfix)",
            "subsections": []
        }
    },
    "summary": "showq - list the Postfix mail queue",
    "flags": [],
    "examples": [],
    "see_also": [
        {
            "name": "pickup",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/pickup/8/json"
        },
        {
            "name": "cleanup",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/cleanup/8/json"
        },
        {
            "name": "qmgr",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/qmgr/8/json"
        },
        {
            "name": "postconf",
            "section": "5",
            "url": "https://www.chedong.com/phpMan.php/man/postconf/5/json"
        },
        {
            "name": "master",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/master/8/json"
        },
        {
            "name": "postlogd",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/postlogd/8/json"
        },
        {
            "name": "syslogd",
            "section": "8",
            "url": "https://www.chedong.com/phpMan.php/man/syslogd/8/json"
        }
    ]
}