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 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 compo-
       nent 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
       always_bcc
	      Address to send a copy of each message that enters the system.

       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 logging 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.

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, including on-disk storage for sender and recipient address information.

Tarpitting
       qmqpd_error_sleep_time
	      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)