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QMQPD(8)                                                                                            QMQPD(8)



NAME
       qmqpd - Postfix QMQP server

SYNOPSIS
       qmqpd [generic Postfix daemon options]

DESCRIPTION
       The  Postfix  QMQP  server  receives  one  message per connection.  Each message is piped through the
       cleanup(8) daemon, and is placed into the incoming 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 authorized 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).

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 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.

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 exam-ples. examples.
       ples.

CONTENT INSPECTION CONTROLS
       content_filter (empty)
              The name of a mail delivery transport that filters mail after it is queued.

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

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 head-ers. headers.
              ers.

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

       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 address 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 QMQP server will pause before sending a negative reply to the client.

MISCELLANEOUS CONTROLS
       config_directory (see 'postconf -d' output)
              The default location of the Postfix main.cf and master.cf configuration 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.

       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 connec-tion connection
              tion 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 clients are allowed to connect to the QMQP server port.

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

       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 (postfix)
              The  mail system name that is prepended to the process name in syslog records, so that "smtpd"
              becomes, for example, "postfix/smtpd".

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

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



                                                                                                    QMQPD(8)