Postfix manual - pickup(8)

    PICKUP(8)                                               PICKUP(8)

    NAME
           pickup - Postfix local mail pickup

    SYNOPSIS
           pickup [generic Postfix daemon options]

    DESCRIPTION
           The  pickup  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 with-
           out notifying the originator.  This program expects to  be
           run from the master(8) process manager.

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

    SECURITY
           The pickup daemon is  moderately  security  sensitive.  It
           runs  with  fixed  low privilege and can run in a chrooted
           environment.  However, the program reads files from poten-
           tially  hostile  users.   The pickup 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).

    BUGS
           The pickup daemon copies mail from file to the  cleanup(8)
           daemon.   It could avoid message copying overhead by send-
           ing 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 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)
                  The name of a mail delivery transport that  filters
                  mail after it is queued.

           receive_override_options (empty)
                  Enable  or  disable  recipient validation, built-in
                  content filtering, or address rewriting.

    MISCELLANEOUS CONTROLS
           config_directory (see 'postconf -d' output)
                  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.

           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 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 pro-
                  cess.

           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 direc-
                  tory.

           syslog_facility (mail)
                  The syslog facility of Postfix logging.

           syslog_name (postfix)
                  The mail system name that is prepended to the  pro-
                  cess  name  in  syslog  records,  so  that  "smtpd"
                  becomes, for example, "postfix/smtpd".

    SEE ALSO
           cleanup(8), message canonicalization
           sendmail(1), Sendmail-compatible interface
           postdrop(1), mail posting agent
           postconf(5), configuration parameters
           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

                                                            PICKUP(8)