CLEANUP(8) System Manager's Manual 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 transformations:
o Insert missing message headers: (Resent-) From:, To:, Message-Id:, and Date:.
o Extract envelope recipient addresses from (Resent-) To:, Cc: and Bcc: message headers when no recipients are specified in the mes-
sage 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). By default, address
masquerading 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 sta-
tus 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)
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.
Content filtering
body_checks
Lookup tables with content filters for message body lines. These filters see physical lines one at a time, in chunks of at most
line_length_limit bytes.
header_checks
Lookup tables with content filters for message header lines. These filters see logical headers one at a time, including headers
that span multiple lines.
Miscellaneous
always_bcc
Address to send a copy of each message that enters the system.
hopcount_limit
Limit the number of Received: message headers.
undisclosed_recipients_header
The header line that is inserted when no recipients were specified in (Resent-)To: or (Resent-)Cc: 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 recipient 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_classes
List of address classes subject to masquerading: zero or more of envelope_sender, envelope_recipient, header_sender, header_recipi-
ent.
masquerade_domains
List of domains that hide their subdomain structure.
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 remembered.
header_size_limit
Limit the amount of memory in bytes used to process a message header.
in_flow_delay
Amount of time to pause before accepting a message, when the message arrival rate exceeds the message delivery rate.
extract_recipient_limit
Limit the amount of recipients extracted from message headers.
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
CLEANUP(8)