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<title> Postfix manual - qmqpd(8) </title>
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QMQPD(8) QMQPD(8)
<b>NAME</b>
qmqpd - Postfix QMQP server
<b>SYNOPSIS</b>
<b>qmqpd</b> [generic Postfix daemon options]
<b>DESCRIPTION</b>
The Postfix QMQP server receives one message per connec-
tion. Each message is piped through the <a href="cleanup.8.html"><b>cleanup</b>(8)</a> dae-
mon, and is placed into the <a href="QSHAPE_README.html#incoming_queue"><b>incoming</b> queue</a> as one single
queue file. The program expects to be run from the <a href="master.8.html"><b>mas-</b></a>
<a href="master.8.html"><b>ter</b>(8)</a> process manager.
The QMQP server implements one access policy: only explic-
itly authorized client hosts are allowed to use the ser-
vice.
<b>SECURITY</b>
The QMQP server is moderately security-sensitive. It talks
to QMQP clients and to DNS servers on the network. The
QMQP server can be run chrooted at fixed low privilege.
<b>DIAGNOSTICS</b>
Problems and transactions are logged to <b>syslogd</b>(8).
<b>BUGS</b>
The QMQP protocol provides only one server reply per mes-
sage delivery. It is therefore not possible to reject
individual recipients.
The QMQP protocol requires the server to receive the
entire message before replying. If a message is malformed,
or if any netstring component is longer than acceptable,
Postfix replies immediately and closes the connection. It
is left up to the client to handle the situation.
<b>CONFIGURATION PARAMETERS</b>
Changes to <a href="postconf.5.html"><b>main.cf</b></a> are picked up automatically, as
<a href="qmqpd.8.html"><b>qmqpd</b>(8)</a> processes run for only a limited amount of time.
Use the command "<b>postfix reload</b>" to speed up a change.
The text below provides only a parameter summary. See
<a href="postconf.5.html"><b>postconf</b>(5)</a> for more details including examples.
<b>CONTENT INSPECTION CONTROLS</b>
<b><a href="postconf.5.html#content_filter">content_filter</a> (empty)</b>
The name of a mail delivery transport that filters
mail after it is queued.
<b><a href="postconf.5.html#receive_override_options">receive_override_options</a> (empty)</b>
Enable or disable recipient validation, built-in
content filtering, or address mapping.
<b>RESOURCE AND RATE CONTROLS</b>
<b><a href="postconf.5.html#line_length_limit">line_length_limit</a> (2048)</b>
Upon input, long lines are chopped up into pieces
of at most this length; upon delivery, long lines
are reconstructed.
<b><a href="postconf.5.html#hopcount_limit">hopcount_limit</a> (50)</b>
The maximal number of Received: message headers
that is allowed in the primary message headers.
<b><a href="postconf.5.html#message_size_limit">message_size_limit</a> (10240000)</b>
The maximal size in bytes of a message, including
envelope information.
<b><a href="postconf.5.html#qmqpd_timeout">qmqpd_timeout</a> (300s)</b>
The time limit for sending or receiving information
over the network.
<b>TROUBLE SHOOTING CONTROLS</b>
<b><a href="postconf.5.html#debug_peer_level">debug_peer_level</a> (2)</b>
The increment in verbose logging level when a
remote client or server matches a pattern in the
<a href="postconf.5.html#debug_peer_list">debug_peer_list</a> parameter.
<b><a href="postconf.5.html#debug_peer_list">debug_peer_list</a> (empty)</b>
Optional list of remote client or server hostname
or network address patterns that cause the verbose
logging level to increase by the amount specified
in $<a href="postconf.5.html#debug_peer_level">debug_peer_level</a>.
<b><a href="postconf.5.html#soft_bounce">soft_bounce</a> (no)</b>
Safety net to keep mail queued that would otherwise
be returned to the sender.
<b>TARPIT CONTROLS</b>
<b><a href="postconf.5.html#qmqpd_error_delay">qmqpd_error_delay</a> (1s)</b>
How long the QMQP server will pause before sending
a negative reply to the client.
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
The default location of the Postfix <a href="postconf.5.html">main.cf</a> and
<a href="master.5.html">master.cf</a> configuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
How much time a Postfix daemon process may take to
handle a request before it is terminated by a
built-in watchdog timer.
<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
The time limit for sending or receiving information
over an internal communication channel.
<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
The maximum amount of time that an idle Postfix
daemon process waits for the next service request
before exiting.
<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
The maximal number of connection requests before a
Postfix daemon process terminates.
<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
The process ID of a Postfix command or daemon
process.
<b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
The process name of a Postfix command or daemon
process.
<b><a href="postconf.5.html#qmqpd_authorized_clients">qmqpd_authorized_clients</a> (empty)</b>
What clients are allowed to connect to the QMQP
server port.
<b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
The location of the Postfix top-level queue direc-
tory.
<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (postfix)</b>
The mail system name that is prepended to the
process name in syslog records, so that "smtpd"
becomes, for example, "postfix/smtpd".
<b><a href="postconf.5.html#verp_delimiter_filter">verp_delimiter_filter</a> (-=+)</b>
The characters Postfix accepts as VERP delimiter
characters on the Postfix <a href="sendmail.1.html"><b>sendmail</b>(1)</a> command line
and in SMTP commands.
<b>SEE ALSO</b>
<a href="http://cr.yp.to/proto/qmqp.html">http://cr.yp.to/proto/qmqp.html</a>, QMQP protocol
<a href="cleanup.8.html">cleanup(8)</a>, message canonicalization
<a href="master.8.html">master(8)</a>, process manager
syslogd(8), system logging
<b>README FILES</b>
<a href="QMQP_README.html">QMQP_README</a>, Postfix ezmlm-idx howto.
<b>LICENSE</b>
The Secure Mailer license must be distributed with this
software.
<b>HISTORY</b>
The qmqpd service was introduced with Postfix version 1.1.
<b>AUTHOR(S)</b>
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
QMQPD(8)
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