1SHOWQ(8) System Manager's Manual SHOWQ(8)
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6 showq - list the Postfix mail queue
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9 showq [generic Postfix daemon options]
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12 The showq(8) daemon reports the Postfix mail queue status. The output
13 is meant to be formatted by the postqueue(1) command, as it emulates
14 the Sendmail `mailq' command.
15 The showq(8) daemon can also be run in stand-alone mode by the supe‐
17 ruser. This mode of operation is used to emulate the `mailq' command
18 while the Postfix mail system is down.
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21 The showq(8) daemon can run in a chroot jail at fixed low privilege,
22 and takes no input from the client. Its service port is accessible to
23 local untrusted users, so the service can be susceptible to denial of
24 service attacks.
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27 None. The showq(8) daemon does not interact with the outside world.
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30 Problems and transactions are logged to syslogd(8).
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33 Changes to main.cf are picked up automatically as showq(8) processes
34 run for only a limited amount of time. Use the command "postfix reload"
35 to speed up a change.
36 The text below provides only a parameter summary. See postconf(5) for
38 more details including examples.
39 config_directory (see 'postconf -d' output)
41 The default location of the Postfix main.cf and master.cf con‐
42 figuration files.
43 daemon_timeout (18000s)
45 How much time a Postfix daemon process may take to handle a
46 request before it is terminated by a built-in watchdog timer.
47 duplicate_filter_limit (1000)
49 The maximal number of addresses remembered by the address dupli‐
50 cate filter for aliases(5) or virtual(5) alias expansion, or for
51 showq(8) queue displays.
52 empty_address_recipient (MAILER-DAEMON)
54 The recipient of mail addressed to the null address.
55 ipc_timeout (3600s)
57 The time limit for sending or receiving information over an
58 internal communication channel.
59 max_idle (100s)
61 The maximum amount of time that an idle Postfix daemon process
62 waits for an incoming connection before terminating voluntarily.
63 max_use (100)
65 The maximal number of incoming connections that a Postfix daemon
66 process will service before terminating voluntarily.
67 process_id (read-only)
69 The process ID of a Postfix command or daemon process.
70 process_name (read-only)
72 The process name of a Postfix command or daemon process.
73 queue_directory (see 'postconf -d' output)
75 The location of the Postfix top-level queue directory.
76 syslog_facility (mail)
78 The syslog facility of Postfix logging.
79 syslog_name (see 'postconf -d' output)
81 A prefix that is prepended to the process name in syslog
82 records, so that, for example, "smtpd" becomes "prefix/smtpd".
83 Available in Postfix version 2.9 and later:
85 enable_long_queue_ids (no)
87 Enable long, non-repeating, queue IDs (queue file names).
88 Available in Postfix 3.3 and later:
90 service_name (read-only)
92 The master.cf service name of a Postfix daemon process.
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95 /var/spool/postfix, queue directories
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98 pickup(8), local mail pickup service
99 cleanup(8), canonicalize and enqueue mail
100 qmgr(8), queue manager
101 postconf(5), configuration parameters
102 master(8), process manager
103 syslogd(8), system logging
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106 The Secure Mailer license must be distributed with this software.
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109 Wietse Venema
110 IBM T.J. Watson Research
111 P.O. Box 704
112 Yorktown Heights, NY 10598, USA
113 Wietse Venema
115 Google, Inc.
116 111 8th Avenue
117 New York, NY 10011, USA
118 SHOWQ(8)