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Postfix sender problem
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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)
