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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  man-
       ager of its arrival.

       The cleanup(8) daemon always performs the following trans-
       formations:

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

       o      Transform  envelope  and  header  addresses  to the
              standard [email protected] 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(8) daemon performs sanity checks on  the  con-
       tent  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. Alterna-
       tively, 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 3463 (Enhanced Status Codes)
       RFC 3464 (Delivery status notifications)

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-recipi-
       ents:;)
              Message  header  that the Postfix cleanup(8) server
              inserts when a message contains no To: or Cc:  mes-
              sage header.

       Available in Postfix version 2.1 only:

       enable_errors_to (no)
              Report  mail  delivery errors to the address speci-
              fied  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  ver-
              sions).

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) manual page.

       Available in Postfix version 2.0 and later:

       body_checks_size_limit (51200)
              How much text in a message body segment (or attach-
              ment,  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 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 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  simu-
       late  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 (2)
              The mail filter protocol version and optional  pro-
              tocol  extensions  for  communication with a Milter
              (mail filter) application.

       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 fil-
              ter) applications.

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

       milter_connect_timeout (30s)
              The  time  limit  for  connecting to a Milter (mail
              filter) application, 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 -n output)
              The  macros  that  are sent to Milter (mail filter)
              applications after completion of  an  SMTP  connec-
              tion.

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

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

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

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

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_8bit-
              mime_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  multipart/*  MIME
              content types.

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 Post-
              fix 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  exten-
              sion 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_canoni-
              cal_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; otherwise, re-
              write 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  vir-
              tual(5) alias expansion, or for showq(8) queue dis-
              plays.

       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 deliv-
              ery 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  expan-
              sion.

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 mes-
              sage 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 the next  service  request
              before exiting.

       max_use (100)
              The  maximal number of connection requests before a
              Postfix daemon process terminates.

       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 deliv-
              ered 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  direc-
              tory.

       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 (postfix)
              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
       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)