Provided by: postfix_2.2.10-1_i386 bug

NAME

       lmtp - Postfix local delivery via LMTP

SYNOPSIS

       lmtp [generic Postfix daemon options]

DESCRIPTION

       The  LMTP  client  processes  message  delivery requests from the queue
       manager. 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
       finished, 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 command)
       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
       postmaster 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 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.

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

RESOURCE AND RATE CONTROLS

       In the text below, transport is the name of the service as specified 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_concurrency_limit)
              Limit the number of parallel deliveries to the same  destination
              via this mail delivery transport.

       transport_destination_recipient_limit
       ($default_destination_recipient_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
              recipients.  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
              banner.

       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 (20s)
              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 (seepostconf -doutput)
              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.

       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
              daemon 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 (seepostconf -doutput)
              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".

SEE ALSO

       bounce(8), delivery status reports
       qmgr(8), queue manager
       postconf(5), configuration parameters
       master(5), generic daemon options
       services(4), Internet services and aliases
       master(8), process manager
       syslogd(8), system logging

README FILES

       Use "postconf readme_directory" or "postconf html_directory" to  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 software.

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)