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QMQPD(8)		    System Manager's Manual		      QMQPD(8)

NAME
       qmqpd - Postfix QMQP server

SYNOPSIS
       qmqpd [generic Postfix daemon options]

DESCRIPTION
       The Postfix QMQP	server receives	one message per	connection.  Each mes-
       sage is piped through the cleanup(8) daemon, and	is placed into the in-
       coming  queue  as one single queue file.	 The program expects to	be run
       from the	master(8) process manager.

       The QMQP	server implements one access policy:  only  explicitly	autho-
       rized client hosts are allowed to use the service.

SECURITY
       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.

DIAGNOSTICS
       Problems	and transactions are logged to syslogd(8) or postlogd(8).

BUGS
       The  QMQP protocol provides only	one server reply per message delivery.
       It is therefore not possible to reject individual recipients.

       The QMQP	protocol requires the server to	receive	the entire message be-
       fore 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.

CONFIGURATION PARAMETERS
       Changes	to  main.cf are	picked up automatically, as qmqpd(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.

CONTENT	INSPECTION CONTROLS
       content_filter (empty)
	      After the	message	is queued, send	 the  entire  message  to  the
	      specified	transport:destination.

       receive_override_options	(empty)
	      Enable or	disable	recipient validation, built-in content filter-
	      ing, or address mapping.

SMTPUTF8 CONTROLS
       Preliminary SMTPUTF8 support is introduced with Postfix 3.0.

       smtputf8_enable (yes)
	      Enable preliminary SMTPUTF8 support for the protocols  described
	      in RFC 6531..6533.

       smtputf8_autodetect_classes (sendmail, verify)
	      Detect  that  a message requires SMTPUTF8	support	for the	speci-
	      fied mail	origin classes.

       Available in Postfix version 3.2	and later:

       enable_idna2003_compatibility (no)
	      Enable  'transitional'  compatibility   between	IDNA2003   and
	      IDNA2008,	 when  converting UTF-8	domain names to/from the ASCII
	      form that	is used	for DNS	lookups.

RESOURCE AND RATE CONTROLS
       line_length_limit (2048)
	      Upon input, long lines are chopped up into  pieces  of  at  most
	      this length; upon	delivery, long lines are reconstructed.

       hopcount_limit (50)
	      The maximal number of Received:  message headers that is allowed
	      in the primary message headers.

       message_size_limit (10240000)
	      The maximal size in bytes	of a message, including	 envelope  in-
	      formation.

       qmqpd_timeout (300s)
	      The  time	 limit	for  sending or	receiving information over the
	      network.

TROUBLE	SHOOTING CONTROLS
       debug_peer_level	(2)
	      The increment in verbose logging level when a remote  client  or
	      server matches a pattern in the debug_peer_list parameter.

       debug_peer_list (empty)
	      Optional list of remote client or	server hostname	or network ad-
	      dress patterns that cause	the verbose logging level to  increase
	      by the amount specified in $debug_peer_level.

       soft_bounce (no)
	      Safety  net to keep mail queued that would otherwise be returned
	      to the sender.

TARPIT CONTROLS
       qmqpd_error_delay (1s)
	      How long the Postfix QMQP	server will  pause  before  sending  a
	      negative reply to	the remote QMQP	client.

MISCELLANEOUS CONTROLS
       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  re-
	      quest before it is terminated by a built-in watchdog timer.

       ipc_timeout (3600s)
	      The  time	limit for sending or receiving information over	an in-
	      ternal 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.

       qmqpd_authorized_clients	(empty)
	      What remote QMQP clients are allowed to connect to  the  Postfix
	      QMQP server port.

       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)
	      A	 prefix	 that  is  prepended  to  the  process	name in	syslog
	      records, so that,	for example, "smtpd" becomes "prefix/smtpd".

       verp_delimiter_filter (-=+)
	      The characters Postfix accepts as	VERP delimiter	characters  on
	      the Postfix sendmail(1) command line and in SMTP commands.

       Available in Postfix version 2.5	and later:

       qmqpd_client_port_logging (no)
	      Enable logging of	the remote QMQP	client port in addition	to the
	      hostname and IP address.

       Available in Postfix 3.3	and later:

       service_name (read-only)
	      The master.cf service name of a Postfix daemon process.

SEE ALSO
       http://cr.yp.to/proto/qmqp.html,	QMQP protocol
       cleanup(8), message canonicalization
       master(8), process manager
       postlogd(8), Postfix logging
       syslogd(8), system logging

README FILES
       Use "postconf readme_directory" or "postconf html_directory" to	locate
       this information.
       QMQP_README, Postfix ezmlm-idx howto.

LICENSE
       The Secure Mailer license must be distributed with this software.

HISTORY
       The qmqpd service was introduced	with Postfix version 1.1.

AUTHOR(S)
       Wietse Venema
       IBM T.J.	Watson Research
       P.O. Box	704
       Yorktown	Heights, NY 10598, USA

       Wietse Venema
       Google, Inc.
       111 8th Avenue
       New York, NY 10011, USA

								      QMQPD(8)

NAME | SYNOPSIS | DESCRIPTION | SECURITY | DIAGNOSTICS | BUGS | CONFIGURATION PARAMETERS | CONTENT INSPECTION CONTROLS | SMTPUTF8 CONTROLS | RESOURCE AND RATE CONTROLS | TROUBLE SHOOTING CONTROLS | TARPIT CONTROLS | MISCELLANEOUS CONTROLS | SEE ALSO | README FILES | LICENSE | HISTORY | AUTHOR(S)

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