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CLEANUP(8)                                                                                        CLEANUP(8)



NAME
       cleanup - canonicalize and enqueue Postfix message

SYNOPSIS
       cleanup [generic Postfix daemon options]

DESCRIPTION
       The  cleanup(8)  daemon  processes inbound mail, inserts it into the incoming mail queue, and informs
       the queue manager of its arrival.

       The cleanup(8) daemon always performs the following transformations:

       •      Insert missing message headers: (Resent-) From:, To:, Message-Id:, and Date:.

       •      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) dae-mon. daemon.
              mon.

       •      Eliminate duplicate envelope recipient addresses.

       The following address transformations are optional:

       •      Optionally, rewrite all envelope and header addresses according to the mappings  specified  in
              the canonical(5) lookup tables.

       •      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.

       •      Optionally, expand envelope recipients according to information found in the virtual(5) lookup
              tables.

       The cleanup(8) 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(8) daemon to bounce the message back
       to the sender in case of trouble.

STANDARDS
       RFC 822 (ARPA Internet Text Messages)
       RFC 2045 (MIME: Format of Internet Message Bodies)
       RFC 2046 (MIME: Media Types)
       RFC 2822 (Internet Message Format)
       RFC 3463 (Enhanced Status Codes)
       RFC 3464 (Delivery status notifications)
       RFC 5322 (Internet Message Format)

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
       Changes to main.cf are picked up automatically, as cleanup(8) processes run for only a limited amount
       of time. Use the command "postfix reload" to speed up a change.

       The  text  below  provides only a parameter summary. See postconf(5) for more details including exam-ples. examples.
       ples.

COMPATIBILITY CONTROLS
       undisclosed_recipients_header (see 'postconf -d' output)
              Message header that the Postfix cleanup(8) server inserts when a message contains  no  To:  or
              Cc: message header.

       Available in Postfix version 2.1 only:

       enable_errors_to (no)
              Report  mail delivery errors to the address specified with the non-standard Errors-To: message
              header, instead of the envelope sender address (this feature is removed with  Postfix  version
              2.2,  is  turned  off  by default with Postfix version 2.1, and is always turned on with older
              Postfix versions).

       Available in Postfix version 2.6 and later:

       always_add_missing_headers (no)
              Always add (Resent-) From:, To:, Date: or Message-ID: headers when not present.

       Available in Postfix version 2.9 and later:

       enable_long_queue_ids (no)
              Enable long, non-repeating, queue IDs (queue file names).

BUILT-IN CONTENT FILTERING CONTROLS
       Postfix built-in content filtering is meant to stop a flood of worms or viruses. It is not a  general
       content filter.

       body_checks (empty)
              Optional  lookup tables for content inspection as specified in the body_checks(5) manual page.

       header_checks (empty)
              Optional lookup tables for content inspection of primary non-MIME message headers,  as  speci-fied specified
              fied in the header_checks(5) manual page.

       Available in Postfix version 2.0 and later:

       body_checks_size_limit (51200)
              How  much  text  in  a message body segment (or attachment, if you prefer to use that term) is
              subjected to body_checks inspection.

       mime_header_checks ($header_checks)
              Optional lookup tables for content inspection of MIME related message headers, as described in
              the header_checks(5) manual page.

       nested_header_checks ($header_checks)
              Optional  lookup  tables  for  content inspection of non-MIME message headers in attached mes-sages, messages,
              sages, as described in the header_checks(5) manual page.

       Available in Postfix version 2.3 and later:

       message_reject_characters (empty)
              The set of characters that Postfix will reject in message content.

       message_strip_characters (empty)
              The set of characters that Postfix will remove from message content.

BEFORE QUEUE MILTER CONTROLS
       As of version 2.3, Postfix supports the Sendmail version 8 Milter (mail filter) protocol.  When  mail
       is  not  received  via  the  smtpd(8)  server, the cleanup(8) server will simulate SMTP events to the
       extent that this is possible. For details see the MILTER_README document.

       non_smtpd_milters (empty)
              A list of Milter (mail filter) applications for new mail that does not arrive via the  Postfix
              smtpd(8) server.

       milter_protocol (6)
              The  mail  filter  protocol  version and optional protocol extensions for communication with a
              Milter application; prior to Postfix 2.6 the default protocol is 2.

       milter_default_action (tempfail)
              The default action when a Milter (mail filter) application is unavailable or mis-configured.

       milter_macro_daemon_name ($myhostname)
              The {daemon_name} macro value for Milter (mail filter) applications.

       milter_macro_v ($mail_name $mail_version)
              The {v} macro value for Milter (mail filter) applications.

       milter_connect_timeout (30s)
              The time limit for connecting to a Milter (mail filter) application, and for negotiating  pro-tocol protocol
              tocol options.

       milter_command_timeout (30s)
              The  time  limit  for  sending  an SMTP command to a Milter (mail filter) application, and for
              receiving the response.

       milter_content_timeout (300s)
              The time limit for sending message content to a Milter  (mail  filter)  application,  and  for
              receiving the response.

       milter_connect_macros (see 'postconf -d' output)
              The macros that are sent to Milter (mail filter) applications after completion of an SMTP con-nection. connection.
              nection.

       milter_helo_macros (see 'postconf -d' output)
              The macros that are sent to Milter (mail filter) applications after the SMTP HELO or EHLO com-mand. command.
              mand.

       milter_mail_macros (see 'postconf -d' output)
              The  macros  that  are sent to Milter (mail filter) applications after the SMTP MAIL FROM com-mand. command.
              mand.

       milter_rcpt_macros (see 'postconf -d' output)
              The macros that are sent to Milter (mail filter) applications after the SMTP RCPT TO  command.

       milter_data_macros (see 'postconf -d' output)
              The  macros  that  are sent to version 4 or higher Milter (mail filter) applications after the
              SMTP DATA command.

       milter_unknown_command_macros (see 'postconf -d' output)
              The macros that are sent to version 3 or higher Milter (mail  filter)  applications  after  an
              unknown SMTP command.

       milter_end_of_data_macros (see 'postconf -d' output)
              The macros that are sent to Milter (mail filter) applications after the message end-of-data.

       Available in Postfix version 2.5 and later:

       milter_end_of_header_macros (see 'postconf -d' output)
              The  macros  that  are  sent to Milter (mail filter) applications after the end of the message
              header.

       Available in Postfix version 2.7 and later:

       milter_header_checks (empty)
              Optional lookup tables for content inspection of message headers that are produced  by  Milter
              applications.

MIME PROCESSING CONTROLS
       Available in Postfix version 2.0 and later:

       disable_mime_input_processing (no)
              Turn off MIME processing while receiving mail.

       mime_boundary_length_limit (2048)
              The maximal length of MIME multipart boundary strings.

       mime_nesting_limit (100)
              The maximal recursion level that the MIME processor will handle.

       strict_8bitmime (no)
              Enable both strict_7bit_headers and strict_8bitmime_body.

       strict_7bit_headers (no)
              Reject mail with 8-bit text in message headers.

       strict_8bitmime_body (no)
              Reject 8-bit message body text without 8-bit MIME content encoding information.

       strict_mime_encoding_domain (no)
              Reject  mail  with  invalid Content-Transfer-Encoding: information for the message/* or multi-part/* multipart/*
              part/* MIME content types.

       Available in Postfix version 2.5 and later:

       detect_8bit_encoding_header (yes)
              Automatically detect 8BITMIME body content by looking  at  Content-Transfer-Encoding:  message
              headers; historically, this behavior was hard-coded to be "always on".

AUTOMATIC BCC RECIPIENT CONTROLS
       Postfix can automatically add BCC (blind carbon copy) when mail enters the mail system:

       always_bcc (empty)
              Optional  address  that receives a "blind carbon copy" of each message that is received by the
              Postfix mail system.

       Available in Postfix version 2.1 and later:

       sender_bcc_maps (empty)
              Optional BCC (blind carbon-copy) address lookup tables, indexed by sender address.

       recipient_bcc_maps (empty)
              Optional BCC (blind carbon-copy) address lookup tables, indexed by recipient address.

ADDRESS TRANSFORMATION CONTROLS
       Address rewriting is delegated to the trivial-rewrite(8) daemon.  The  cleanup(8)  server  implements
       table driven address mapping.

       empty_address_recipient (MAILER-DAEMON)
              The recipient of mail addressed to the null address.

       canonical_maps (empty)
              Optional address mapping lookup tables for message headers and envelopes.

       recipient_canonical_maps (empty)
              Optional address mapping lookup tables for envelope and header recipient addresses.

       sender_canonical_maps (empty)
              Optional address mapping lookup tables for envelope and header sender addresses.

       masquerade_classes (envelope_sender, header_sender, header_recipient)
              What addresses are subject to address masquerading.

       masquerade_domains (empty)
              Optional list of domains whose subdomain structure will be stripped off in email addresses.

       masquerade_exceptions (empty)
              Optional  list  of  user names that are not subjected to address masquerading, even when their
              address matches $masquerade_domains.

       propagate_unmatched_extensions (canonical, virtual)
              What address lookup tables copy an address extension from the lookup key to the lookup result.

       Available before Postfix version 2.0:

       virtual_maps (empty)
              Optional  lookup  tables  with  a)  names  of  domains  for which all addresses are aliased to
              addresses in other local or remote domains, and b) addresses that are aliased to addresses  in
              other local or remote domains.

       Available in Postfix version 2.0 and later:

       virtual_alias_maps ($virtual_maps)
              Optional  lookup tables that alias specific mail addresses or domains to other local or remote
              address.

       Available in Postfix version 2.2 and later:

       canonical_classes (envelope_sender, envelope_recipient, header_sender, header_recipient)
              What addresses are subject to canonical_maps address mapping.

       recipient_canonical_classes (envelope_recipient, header_recipient)
              What addresses are subject to recipient_canonical_maps address mapping.

       sender_canonical_classes (envelope_sender, header_sender)
              What addresses are subject to sender_canonical_maps address mapping.

       remote_header_rewrite_domain (empty)
              Don't rewrite message headers from remote clients at all when this parameter is empty;  other-wise, otherwise,
              wise, rewrite message headers and append the specified domain name to incomplete addresses.

RESOURCE AND RATE CONTROLS
       duplicate_filter_limit (1000)
              The  maximal  number of addresses remembered by the address duplicate filter for aliases(5) or
              virtual(5) alias expansion, or for showq(8) queue displays.

       header_size_limit (102400)
              The maximal amount of memory in bytes for storing a message header.

       hopcount_limit (50)
              The maximal number of Received:  message headers that is allowed in the primary message  head-ers. headers.
              ers.

       in_flow_delay (1s)
              Time  to  pause before accepting a new message, when the message arrival rate exceeds the mes-sage message
              sage delivery rate.

       message_size_limit (10240000)
              The maximal size in bytes of a message, including envelope information.

       Available in Postfix version 2.0 and later:

       header_address_token_limit (10240)
              The maximal number of address tokens are allowed in an address message header.

       mime_boundary_length_limit (2048)
              The maximal length of MIME multipart boundary strings.

       mime_nesting_limit (100)
              The maximal recursion level that the MIME processor will handle.

       queue_file_attribute_count_limit (100)
              The maximal number of (name=value) attributes that may be stored in a Postfix queue file.

       Available in Postfix version 2.1 and later:

       virtual_alias_expansion_limit (1000)
              The maximal number of addresses that virtual  alias  expansion  produces  from  each  original
              recipient.

       virtual_alias_recursion_limit (1000)
              The maximal nesting depth of virtual alias expansion.

MISCELLANEOUS CONTROLS
       config_directory (see 'postconf -d' output)
              The default location of the Postfix main.cf and master.cf configuration files.

       daemon_timeout (18000s)
              How much time a Postfix daemon process may take to handle a request before it is terminated by
              a built-in watchdog timer.

       delay_logging_resolution_limit (2)
              The maximal number of digits after the decimal point when logging sub-second delay values.

       delay_warning_time (0h)
              The time after which the sender receives the message headers of mail that is still queued.

       ipc_timeout (3600s)
              The time limit for sending or receiving information over an internal communication channel.

       max_idle (100s)
              The maximum amount of time that an idle Postfix daemon process waits for an  incoming  connec-tion connection
              tion before terminating voluntarily.

       max_use (100)
              The  maximal  number of incoming connections that a Postfix daemon process will service before
              terminating voluntarily.

       myhostname (see 'postconf -d' output)
              The internet hostname of this mail system.

       myorigin ($myhostname)
              The domain name that locally-posted mail appears to come from, and that locally posted mail is
              delivered to.

       process_id (read-only)
              The process ID of a Postfix command or daemon process.

       process_name (read-only)
              The process name of a Postfix command or daemon process.

       queue_directory (see 'postconf -d' output)
              The location of the Postfix top-level queue directory.

       soft_bounce (no)
              Safety net to keep mail queued that would otherwise be returned to the sender.

       syslog_facility (mail)
              The syslog facility of Postfix logging.

       syslog_name (see 'postconf -d' output)
              The  mail system name that is prepended to the process name in syslog records, so that "smtpd"
              becomes, for example, "postfix/smtpd".

       Available in Postfix version 2.1 and later:

       enable_original_recipient (yes)
              Enable support for the X-Original-To message header.

FILES
       /etc/postfix/canonical*, canonical mapping table
       /etc/postfix/virtual*, virtual mapping table

SEE ALSO
       trivial-rewrite(8), address rewriting
       qmgr(8), queue manager
       header_checks(5), message header content inspection
       body_checks(5), body parts content inspection
       canonical(5), canonical address lookup table format
       virtual(5), virtual alias lookup table format
       postconf(5), configuration parameters
       master(5), generic daemon options
       master(8), process manager
       syslogd(8), system logging

README FILES
       Use "postconf readme_directory" or "postconf html_directory" to locate this information.
       ADDRESS_REWRITING_README Postfix address manipulation
       CONTENT_INSPECTION_README content inspection

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)