CLEANUP(8) CLEANUP(8)
NAME
cleanup - canonicalize and enqueue Postfix message
SYNOPSIS
cleanup [generic Postfix daemon options]
DESCRIPTION
The cleanup daemon processes inbound mail, inserts it into
the incoming mail queue, and informs the queue manager of
its arrival.
The cleanup daemon always performs the following transfor-
mations:
o Insert missing message headers: (Resent-) From:,
Message-Id:, and Date:.
o Extract envelope recipient addresses from (Resent-)
To:, Cc: and Bcc: message headers when no recipi-
ents are specified in the message envelope.
o Transform envelope and header addresses to the
standard user@fully-qualified-domain form that is
expected by other Postfix programs. This task is
delegated to the trivial-rewrite(8) daemon.
o Eliminate duplicate envelope recipient addresses.
The following address transformations are optional:
o Optionally, rewrite all envelope and header
addresses according to the mappings specified in
the canonical(5) lookup tables.
o Optionally, masquerade envelope sender addresses
and message header addresses (i.e. strip host or
domain information below all domains listed in the
masquerade_domains parameter, except for user names
listed in masquerade_exceptions). Address mas-
querading does not affect envelope recipients.
o Optionally, expand envelope recipients according to
information found in the virtual(5) lookup tables.
The cleanup daemon performs sanity checks on the content
of each message. When it finds a problem, by default it
returns a diagnostic status to the client, and leaves it
up to the client to deal with the problem. Alternatively,
the client can request the cleanup daemon to bounce the
message back to the sender in case of trouble.
STANDARDS
RFC 822 (ARPA Internet Text Messages)
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DIAGNOSTICS
Problems and transactions are logged to syslogd(8).
BUGS
Table-driven rewriting rules make it hard to express if
then else and other logical relationships.
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.
Miscellaneous
always_bcc
Address to send a copy of each message that enters
the system.
hopcount_limit
Limit the number of Received: message headers.
Address transformations
empty_address_recipient
The destination for undeliverable mail from <>.
This substitution is done before all other address
rewriting.
canonical_maps
Address mapping lookup table for sender and recipi-
ent addresses in envelopes and headers.
recipient_canonical_maps
Address mapping lookup table for envelope and
header recipient addresses.
sender_canonical_maps
Address mapping lookup table for envelope and
header sender addresses.
masquerade_domains
List of domains that hide their subdomain struc-
ture.
masquerade_exceptions
List of user names that are not subject to address
masquerading.
virtual_maps
Address mapping lookup table for envelope recipient
addresses.
Resource controls
duplicate_filter_limit
Limit the number of envelope recipients that are
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remembered.
header_size_limit
Limit the amount of memory in bytes used to process
a message header.
SEE ALSO
canonical(5) canonical address lookup table format
qmgr(8) queue manager daemon
syslogd(8) system logging
trivial-rewrite(8) address rewriting
virtual(5) virtual address lookup table format
FILES
/etc/postfix/canonical*, canonical mapping table
/etc/postfix/virtual*, virtual mapping table
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
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