SHOWQ(8postfix) SHOWQ(8postfix) 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(8postfix)
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