Provided by: postfix_3.1.0-3_amd64 bug

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 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  filtering,  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 specified mail origin
              classes.

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 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 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 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 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)
              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.

       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.

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

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

                                                                                  QMQPD(8postfix)