QMQPD(8)                                                 QMQPD(8)

NAME
       qmqpd - Postfix QMQP server

SYNOPSIS
       qmqpd [generic Postfix daemon options]

DESCRIPTION
       The  Postfix  QMQP server receives one message per connec-
       tion.  Each message is piped through the  cleanup(8)  dae-
       mon,  and  is placed into the incoming queue as one single
       queue file.  The program expects to be run from  the  mas-
       ter(8) process manager.

       The QMQP server implements one access policy: only explic-
       itly authorized client hosts are allowed to use  the  ser-
       vice.

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 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.

CONFIGURATION PARAMETERS
       The  following  main.cf parameters are especially relevant
       to this program. See the Postfix main.cf file  for  syntax
       details  and  for  default  values. Use the postfix reload
       command after a configuration change.

Miscellaneous
       debug_peer_level
              Increment in verbose logging level  when  a  remote
              host  matches  a  pattern  in  the  debug_peer_list
              parameter.

       debug_peer_list
              List of domain or network patterns. When  a  remote
              host  matches  a pattern, increase the verbose log-
              ging  level  by  the  amount   specified   in   the
              debug_peer_level parameter.

       hopcount_limit
              Limit the number of Received: message headers.

       qmqpd_authorized_clients
              A list of domain or network patterns that specifies
              what clients are allowed to use the service.

       qmqpd_timeout
              Limit the time to send a  server  response  and  to
              receive a client request.

       soft_bounce
              Change  hard  (D)  reject  responses  into soft (Z)
              reject responses.  This can be useful  for  testing
              purposes.

Content inspection controls
       content_filter
              The  name of a mail delivery transport that filters
              mail and that either bounces mail or re-injects the
              result  back into Postfix.  This parameter uses the
              same syntax as the right-hand  side  of  a  Postfix
              transport table.

       receive_override_options
              The  following  options  override main.cf settings.
              The options are passed on to the downstream cleanup
              server.

              no_address_mappings
                     Disable  canonical  address mapping, virtual
                     alias map expansion,  address  masquerading,
                     and  automatic  BCC recipients. Specify this
                     if address mapping etc. are to be done after
                     an external content filter.

              no_header_body_checks
                     Disable  header/body_checks. Specify this if
                     header/body_checks are to be done  after  an
                     external content filter.

Resource controls
       line_length_limit
              Limit  the  amount  of memory in bytes used for the
              handling of partial input lines, and the length  of
              sender  and  recipient  addresses that are received
              from client.

       message_size_limit
              Limit the total size in bytes of a message, includ-
              ing   on-disk  storage  for  sender  and  recipient
              address information.

Tarpitting
       qmqpd_error_delay
              Time to wait in seconds before informing the client
              of a problem. This slows down run-away errors.

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

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

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

                                                         QMQPD(8)