pickup - Postfix local mail pickup
SYNOPSISpickup [generic Postfix daemon options]
The pickup daemon waits for hints that new mail has been
dropped into the world-writable maildrop directory, and
feeds it into the cleanup(8) daemon. Ill-formatted files
are deleted without notifying the originator. This pro-
gram expects to be run from the master(8) process manager.
None. The pickup daemon does not interact with the outside
The pickup daemon runs with superuser privileges so that
it 1) can open a queue file with the rights of the submit-
ting user and 2) can access the Postfix private IPC chan-
nels. On the positive side, the program can run chrooted,
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.
Problems and transactions are logged to syslogd(8).
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.
The following main.cf parameters are especially relevant
to this program. See the Postfix main.cf file for syntax
details and for default values. Use the postfixreload
command after a configuration change.
The name of a mail delivery transport that filters
mail and that either bounces mail or re-injects the
result back into Postfix. This parameter uses the
same syntax as the right-hand side of a Postfix
Address to send a copy of each message that enters
The process privileges used while not opening a
Top-level directory of the Postfix queue.
SEEALSOcleanup(8) message canonicalization
master(8) process manager
syslogd(8) system logging
The Secure Mailer license must be distributed with this
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