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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 Post‐
	      fix  programs.  This task is delegated to the trivial-rewrite(8)
	      daemon.

       ·      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 examples.

COMPATIBILITY CONTROLS
       undisclosed_recipients_header (To: undisclosed-recipients:;)
	      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.

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 specified in the header_checks(5) man‐
	      ual 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 mes‐
	      sage  headers  in	 attached  messages,  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 con‐
	      tent.

       message_strip_characters (empty)
	      The set of characters that Postfix will remove from message con‐
	      tent.

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 exten‐
	      sions 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)  applica‐
	      tions.

       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) applica‐
	      tion, and for negotiating protocol 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 connection.

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

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

       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 encod‐
	      ing information.

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

       Available in Postfix version 2.5 and later:

       detect_8bit_encoding_header (yes)
	      Automatically  detect  8BITMIME  body content by looking at Con‐
	      tent-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  $masquer‐
	      ade_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 map‐
	      ping.

       remote_header_rewrite_domain (empty)
	      Don't rewrite message headers from remote clients	 at  all  when
	      this  parameter is empty; otherwise, 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 dupli‐
	      cate 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 headers.

       in_flow_delay (1s)
	      Time to pause before accepting a new message, when  the  message
	      arrival rate exceeds the message 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 con‐
	      figuration 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 log‐
	      ging 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 connection 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, "post‐
	      fix/smtpd".

       Available in Postfix version 2.1 and later:

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

FILES
       /usr/local/etc/postfix/canonical*, canonical mapping table
       /usr/local/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)
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