LMTP(8)                                                                LMTP(8)

NAME
       lmtp  -  Postfix local delivery via LMTP SYNOPSIS lmtp [generic Postfix
       daemon options]

DESCRIPTION
       The LMTP client processes message delivery requests from the queue man-
       ager.  Each  request specifies a queue file, a sender address, a domain
       or host to deliver to, and recipient information.  This program expects
       to be run from the master(8) process manager.

       The  LMTP  client  updates  the queue file and marks recipients as fin-
       ished, or it informs the queue manager that delivery  should  be  tried
       again  at  a  later  time.  Delivery  status  reports  are  sent to the
       bounce(8), defer(8) or trace(8) daemon as appropriate.

       The LMTP client connects to the destination specified  in  the  message
       delivery  request.  The  destination,  usually specified in the Postfix
       transport(5) table, has the form:

       unix:pathname
              Connect to the local UNIX-domain server that  is  bound  to  the
              specified  pathname.  If  the process runs chrooted, an absolute
              pathname is interpreted relative to the changed root  directory.

       inet:host, inet:host:port (symbolic host)

       inet:[addr], inet:[addr]:port (numeric host)
              Connect to the specified IPV4 TCP port on the specified local or
              remote host. If no  port  is  specified,  connect  to  the  port
              defined  as  lmtp  in services(4).  If no such service is found,
              the lmtp_tcp_port configuration parameter (default value of  24)
              will be used.

              The  LMTP  client  does  not perform MX (mail exchanger) lookups
              since those are defined only for mail delivery via SMTP.

       If neither unix: nor inet: are specified, inet: is assumed.  SECURITY
       The LMTP client is moderately  security-sensitive.  It  talks  to  LMTP
       servers  and  to DNS servers on the network. The LMTP client can be run
       chrooted at fixed low privilege.  STANDARDS RFC 821 (SMTP protocol) RFC
       1651  (SMTP service extensions) RFC 1652 (8bit-MIME transport) RFC 1870
       (Message Size Declaration) RFC 2033 (LMTP protocol) RFC 2554 (AUTH com-
       mand) RFC 2821 (SMTP protocol) RFC 2920 (SMTP Pipelining)

DIAGNOSTICS
       Problems  and transactions are logged to syslogd(8).  Corrupted message
       files are marked so that the queue manager can move them to the corrupt
       queue for further inspection.

       Depending  on the setting of the notify_classes parameter, the postmas-
       ter is notified of bounces, protocol problems, and  of  other  trouble.
       CONFIGURATION PARAMETERS
       Changes  to  main.cf  are picked up automatically, as lmtp(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.  COMPATIBILITY CONTROLS

       lmtp_skip_quit_response (no)
              Wait for the response to the LMTP QUIT command.  TROUBLE  SHOOT-
              ING 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.

       error_notice_recipient (postmaster)
              The recipient of postmaster notifications  about  mail  delivery
              problems that are caused by policy, resource, software or proto-
              col errors.

       notify_classes (resource, software)
              The list of error classes that are reported to  the  postmaster.
              EXTERNAL CONTENT INSPECTION CONTROLS
              Available in Postfix version 2.1 and later:

       lmtp_send_xforward_command (no)
              Send  an  XFORWARD command to the LMTP server when the LMTP LHLO
              server response announces XFORWARD support.  SASL AUTHENTICATION
              CONTROLS

       lmtp_sasl_auth_enable (no)
              Enable SASL authentication in the Postfix LMTP client.

       lmtp_sasl_password_maps (empty)
              Optional  LMTP  client  lookup tables with one username:password
              entry per host or domain.

       lmtp_sasl_security_options (noplaintext, noanonymous)
              What  authentication  mechanisms  the  Postfix  LMTP  client  is
              allowed to use.

       lmtp_sasl_path (empty)
              The path where SASL will look for plugins. This is a colon sepa-
              rated list of directories where the SASL plugins shared  objects
              are  located.   The default value is the null string, which will
              use the path defined in the SASL  library.   RESOURCE  AND  RATE
              CONTROLS
              In the text below, transport is the name of the service as spec-
              ified in the master.cf file.

       lmtp_cache_connection (yes)
              Keep Postfix LMTP client connections open for  up  to  $max_idle
              seconds.

       transport_destination_concurrency_limit   ($default_destination_concur-
       rency_limit)
              Limit  the number of parallel deliveries to the same destination
              via this mail delivery transport.

       transport_destination_recipient_limit     ($default_destination_recipi-
       ent_limit)
              Limit the number of recipients per  message  delivery  via  this
              mail delivery transport.

              This  parameter  becomes  significant if the LMTP client is used
              for local delivery.  Some LMTP servers can optimize delivery  of
              the  same  message to multiple recipients. The default limit for
              local mail delivery is 1.

              Setting this parameter to 0 will lead to an unbounded number  of
              recipients  per delivery.  However, this could be risky since it
              may make the machine vulnerable to running out of  resources  if
              messages  are  encountered  with an inordinate number of recipi-
              ents.  Exercise care when setting this parameter.

       lmtp_connect_timeout (0s)
              The LMTP client time limit for completing a TCP  connection,  or
              zero (use the operating system built-in time limit).

       lmtp_lhlo_timeout (300s)
              The  LMTP client time limit for receiving the LMTP greeting ban-
              ner.

       lmtp_xforward_timeout (300s)
              The LMTP client time limit for sending the XFORWARD command, and
              for receiving the server response.

       lmtp_mail_timeout (300s)
              The  LMTP  client  time limit for sending the MAIL FROM command,
              and for receiving the server response.

       lmtp_rcpt_timeout (300s)
              The LMTP client time limit for sending the RCPT TO command,  and
              for receiving the server response.

       lmtp_data_init_timeout (120s)
              The  LMTP  client  time limit for sending the LMTP DATA command,
              and for receiving the server response.

       lmtp_data_xfer_timeout (180s)
              The LMTP client time limit for sending the LMTP message content.

       lmtp_data_done_timeout (600s)
              The  LMTP  client  time  limit for sending the LMTP ".", and for
              receiving the server response.

       lmtp_rset_timeout (120s)
              The LMTP client time limit for sending the RSET command, and for
              receiving the server response.

       lmtp_quit_timeout (300s)
              The LMTP client time limit for sending the QUIT command, and for
              receiving the server response.  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
              request before it is terminated by a built-in watchdog timer.

       disable_dns_lookups (no)
              Disable DNS lookups in the Postfix SMTP and LMTP clients.

       ipc_timeout (3600s)
              The time limit for sending  or  receiving  information  over  an
              internal communication channel.

       lmtp_tcp_port (24)
              The default TCP port that the Postfix LMTP client connects to.

       max_idle (100s)
              The  maximum  amount of time that an idle Postfix daemon process
              waits for the next service request before exiting.

       max_use (100)
              The maximal number of connection requests before a Postfix  dae-
              mon process terminates.

       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.

       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,  "post-
              fix/smtpd".

       lmtp_bind_address ()
              Numerical source network address (IPv4) to bind to when making a
              connection.

       lmtp_bind_address6 ()
              Numerical source network address (IPv6) to bind to when making a
              connection.    SEE   ALSO  bounce(8),  delivery  status  reports
              qmgr(8), queue  manager  postconf(5),  configuration  parameters
              services(4),  Internet  services  and aliases master(8), process
              manager syslogd(8), system logging README FILES
              locate this information.
              LMTP_README, Postfix LMTP client howto
              VIRTUAL_README, virtual delivery agent howto
              LICENSE
              The  Secure  Mailer  license must be distributed with this soft-
              ware.  AUTHOR(S) Wietse Venema IBM T.J. Watson Research P.O. Box
              704 Yorktown Heights, NY 10598, USA

              Alterations  for  LMTP by: Philip A. Prindeville Mirapoint, Inc.
              USA.

              Additional work on LMTP by: Amos Gouaux University of  Texas  at
              Dallas P.O. Box 830688, MC34 Richardson, TX 75083, USA

                                                                       LMTP(8)