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).

### 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) 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.
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 (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