7
list the Postfix mail queue
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\fBshowq\fR [generic Postfix daemon options]
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The \fBshowq\fR daemon reports the Postfix mail queue status.
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It is the program that emulates the sendmail `mailq' command.
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The \fBshowq\fR daemon can also be run in stand-alone mode
19
by the superuser. This mode of operation is used to emulate
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the `mailq' command while the Postfix mail system is down.
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The \fBshowq\fR daemon can run in a chroot jail at fixed low
27
privilege, and takes no input from the client. Its service port
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is accessible to local untrusted users, so the service can be
29
susceptible to denial of service attacks.
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None. The showq daemon does not interact with the outside world.
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Problems and transactions are logged to \fBsyslogd\fR(8).
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The \fBshowq\fR daemon runs at a fixed low privilege; consequently,
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it cannot extract information from queue files in the
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\fBmaildrop\fR directory.
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.SH "CONFIGURATION PARAMETERS"
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Changes to \fBmain.cf\fR are picked up automatically as showq(8)
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processes run for only a limited amount of time. Use the command
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"\fBpostfix reload\fR" to speed up a change.
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The text below provides only a parameter summary. See
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postconf(5) for more details including examples.
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.IP "\fBconfig_directory (see 'postconf -d' output)\fR"
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The default location of the Postfix main.cf and master.cf
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.IP "\fBdaemon_timeout (18000s)\fR"
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How much time a Postfix daemon process may take to handle a
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request before it is terminated by a built-in watchdog timer.
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.IP "\fBduplicate_filter_limit (1000)\fR"
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The maximal number of addresses remembered by the address
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duplicate filter for aliases(5) or virtual(5) alias expansion, or
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for showq(8) queue displays.
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.IP "\fBempty_address_recipient (MAILER-DAEMON)\fR"
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The recipient of mail addressed to the null address.
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.IP "\fBipc_timeout (3600s)\fR"
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The time limit for sending or receiving information over an internal
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communication channel.
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.IP "\fBmax_idle (100s)\fR"
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The maximum amount of time that an idle Postfix daemon process
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waits for the next service request before exiting.
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.IP "\fBmax_use (100)\fR"
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The maximal number of connection requests before a Postfix daemon
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.IP "\fBprocess_id (read-only)\fR"
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The process ID of a Postfix command or daemon process.
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.IP "\fBprocess_name (read-only)\fR"
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The process name of a Postfix command or daemon process.
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.IP "\fBqueue_directory (see 'postconf -d' output)\fR"
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The location of the Postfix top-level queue directory.
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.IP "\fBsyslog_facility (mail)\fR"
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The syslog facility of Postfix logging.
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.IP "\fBsyslog_name (postfix)\fR"
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The mail system name that is prepended to the process name in syslog
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records, so that "smtpd" becomes, for example, "postfix/smtpd".
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/var/spool/postfix, queue directories
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pickup(8), local mail pickup service
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cleanup(8), canonicalize and enqueue mail
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qmgr(8), queue manager
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postconf(5), configuration parameters
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master(8), process manager
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syslogd(8), system logging
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The Secure Mailer license must be distributed with this software.
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IBM T.J. Watson Research
114
Yorktown Heights, NY 10598, USA