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 out-
           side 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 poten-
           tially 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).

    BUGS
           The  pickup(8)  daemon  copies  mail  from  file  to   the
           cleanup(8)  daemon.   It could avoid message copying over-
           head 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)
                  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 mapping.

    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  an incoming connection
                  before terminating voluntarily.

           max_use (100)
                  The maximal number of incoming connections  that  a
                  Postfix  daemon  process will service before termi-
                  nating 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  direc-
                  tory.

           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
           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
           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)