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 without 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 potentially 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 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
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 postfix reload command after a configuration change.

Content inspection controls

content_filter
    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 transport table.

receive_override_options
    The following options override main.cf settings. The options are passed on to the downstream cleanup server.

    no_address_mappings
        Disable canonical address mapping, virtual alias map expansion, address masquerading, and automatic BCC recipients. Specify this if address mapping etc. are to be done after an external content filter.

    no_header_body_checks
        Disable header/body_checks. Specify this if header/body_checks are to be done after an external content filter.

Miscellaneous

queue_directory
    Top-level directory of the Postfix queue.

SEE ALSO
cleanup(8) message canonicalization
master(8) process manager
sendmail(1), postdrop(8) mail posting agent
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