Postfix manual - pickup(8)

    PICKUP(8)                                                            PICKUP(8)

    NAME
           pickup - Postfix local mail pickup

    SYNOPSIS
           pickup [generic Postfix daemon options]

    DESCRIPTION
           The  pickup(8)  daemon  waits  for hints that new mail has been dropped
           into the maildrop directory, and feeds it into the  cleanup(8)  daemon.
           Ill-formatted files are deleted without notifying the originator.  This
           program expects to be run from the master(8) process manager.

    STANDARDS
           None. The pickup(8) daemon does not interact with the outside world.

    SECURITY
           The pickup(8) daemon is moderately security  sensitive.  It  runs  with
           fixed  low  privilege  and can run in a chrooted environment.  However,
           the program reads files from potentially hostile users.  The  pickup(8)
           daemon opens no files for writing, is careful about what files it opens
           for reading, and does not actually touch any data that is sent  to  its
           public service endpoint.

    DIAGNOSTICS
           Problems and transactions are logged to syslogd(8) or postlogd(8).

    BUGS
           The  pickup(8)  daemon  copies mail from file to the cleanup(8) daemon.
           It could avoid message copying overhead by sending  a  file  descriptor
           instead  of  file  data, but then the already complex cleanup(8) daemon
           would have to deal with unfiltered user data.

    CONFIGURATION PARAMETERS
           As the pickup(8) daemon is a relatively long-running process, up to  an
           hour  may  pass  before a main.cf change takes effect.  Use the command
           "postfix reload" command 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 filter-
                  ing, or address mapping.

    MISCELLANEOUS CONTROLS
           config_directory (see 'postconf -d' output)
                  The  default  location of the Postfix main.cf and master.cf con-
                  figuration files.

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

           line_length_limit (2048)
                  Upon  input,  long  lines  are chopped up into pieces of at most
                  this length; upon delivery, long lines are reconstructed.

           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.

           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)
                  A  prefix  that  is  prepended  to  the  process  name in syslog
                  records, so that, for example, "smtpd" becomes "prefix/smtpd".

           Available in Postfix 3.3 and later:

           service_name (read-only)
                  The master.cf service name of a Postfix daemon process.

           Available in Postfix 3.5 and later:

           info_log_address_format (external)
                  The email address form that will be used  in  non-debug  logging
                  (info, warning, etc.).

    SEE ALSO
           cleanup(8), message canonicalization
           sendmail(1), Sendmail-compatible interface
           postdrop(1), mail posting agent
           postconf(5), configuration parameters
           master(5), generic daemon options
           master(8), process manager
           postlogd(8), Postfix logging
           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

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

                                                                         PICKUP(8)