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SHOWQ(8)                                       System Manager's Manual                                       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 superuser. 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 configuration 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 duplicate 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 terminatā€
              ing voluntarily.

       process_id (read-only)

              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:

       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



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