    SHOWQ(8)                                                              SHOWQ(8)

    NAME
           showq - list the Postfix mail queue

    SYNOPSIS
           showq [generic Postfix daemon options]

    DESCRIPTION
           The  showq(8)  daemon reports the Postfix mail queue status.  It is the
           program that emulates the sendmail `mailq' command.

           The showq(8) 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.

    SECURITY
           The showq(8) 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.

    STANDARDS
           None. The showq(8) daemon does not interact with the outside world.

    DIAGNOSTICS
           Problems and transactions are logged to syslogd(8).

    CONFIGURATION PARAMETERS
           Changes  to  main.cf  are picked up automatically as showq(8) processes
           run for only a limited amount of time. Use the command "postfix reload"
           to speed up a change.

           The  text  below provides only a parameter summary. See postconf(5) for
           more details including examples.

           config_directory (see 'postconf -d' output)
                  The default location of the Postfix main.cf and  master.cf  con-
                  figuration files.

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

           duplicate_filter_limit (1000)
                  The maximal number of addresses remembered by the address dupli-
                  cate filter for aliases(5) or virtual(5) alias expansion, or for
                  showq(8) queue displays.

           empty_address_recipient (MAILER-DAEMON)
                  The recipient of mail addressed to the null address.

           ipc_timeout (3600s)
                  The time limit for sending  or  receiving  information  over  an
                  internal communication channel.

           max_idle (100s)
                  The  maximum  amount of time that an idle Postfix daemon process
                  waits for an incoming connection before terminating voluntarily.

           max_use (100)
                  The maximal number of incoming connections that a Postfix daemon
                  process will service before terminating voluntarily.

           process_id (read-only)
                  The process ID of a Postfix command or daemon process.

           process_name (read-only)
                  The process name of a Postfix command or daemon process.

           queue_directory (see 'postconf -d' output)
                  The location of the Postfix top-level queue directory.

           syslog_facility (mail)
                  The syslog facility of Postfix logging.

           syslog_name (see 'postconf -d' output)
                  The mail system name that is prepended to the  process  name  in
                  syslog  records,  so  that  "smtpd" becomes, for example, "post-
                  fix/smtpd".

           Available in Postfix version 2.9 and later:

           enable_long_queue_ids (no)
                  Enable long, non-repeating, queue IDs (queue file names).

    FILES
           /var/spool/postfix, queue directories

    SEE ALSO
           pickup(8), local mail pickup service
           cleanup(8), canonicalize and enqueue mail
           qmgr(8), queue manager
           postconf(5), configuration parameters
           master(8), process manager
           syslogd(8), system logging

    LICENSE
           The Secure Mailer license must be distributed with this software.

    AUTHOR(S)
           Wietse Venema
           IBM T.J. Watson Research
           P.O. Box 704
           Yorktown Heights, NY 10598, USA

                                                                          SHOWQ(8)