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)
- 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
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 (see 'postconf -d' output)
- 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
Wietse Venema
Google, Inc.
111 8th Avenue
New York, NY 10011, USA