Subversion Repositories configs

# CANONICAL(5)                                                      CANONICAL(5)

#

# NAME

#        canonical - Postfix canonical table format

#

# SYNOPSIS

#        postmap /etc/postfix/canonical

#

#        postmap -q "string" /etc/postfix/canonical

#

#        postmap -q - /etc/postfix/canonical <inputfile

#

# DESCRIPTION

#        The  optional canonical(5) table specifies an address map-

#        ping for local and non-local  addresses.  The  mapping  is

#        used  by the cleanup(8) daemon, before mail is stored into

#        the queue.  The address mapping is recursive.

#

#        Normally, the canonical(5) table is specified  as  a  text

#        file  that serves as input to the postmap(1) command.  The

#        result, an indexed file in dbm or db format, is  used  for

#        fast  searching  by  the  mail system. Execute the command

#        "postmap /etc/postfix/canonical"  to  rebuild  an  indexed

#        file after changing the corresponding text file.

#

#        When  the  table  is provided via other means such as NIS,

#        LDAP or SQL, the same lookups are  done  as  for  ordinary

#        indexed files.

#

#        Alternatively,  the  table  can  be  provided  as  a regu-

#        lar-expression map where patterns  are  given  as  regular

#        expressions,  or  lookups  can  be  directed  to TCP-based

#        server. In those cases, the lookups are done in a slightly

#        different way as described below under "REGULAR EXPRESSION

#        TABLES" or "TCP-BASED TABLES".

#

#        By default the canonical(5) mapping affects  both  message

#        header  addresses  (i.e. addresses that appear inside mes-

#        sages) and message envelope addresses  (for  example,  the

#        addresses  that  are used in SMTP protocol commands). This

#        is controlled with the canonical_classes parameter.

#

#        NOTE: Postfix versions 2.2 and later rewrite message head-

#        ers  from  remote  SMTP clients only if the client matches

#        the  local_header_rewrite_clients  parameter,  or  if  the

#        remote_header_rewrite_domain configuration parameter spec-

#        ifies a non-empty value. To get the behavior before  Post-

#        fix    2.2,    specify   "local_header_rewrite_clients   =

#        static:all".

#

#        Typically, one would use the canonical(5) table to replace

#        login   names   by  Firstname.Lastname,  or  to  clean  up

#        addresses produced by legacy mail systems.

#

#        The canonical(5) mapping is not to be confused  with  vir-

#        tual  alias  support or with local aliasing. To change the

#        destination but not the headers,  use  the  virtual(5)  or

#        aliases(5) map instead.

#

# CASE FOLDING

#        The  search  string is folded to lowercase before database

#        lookup. As of Postfix 2.3, the search string is  not  case

#        folded  with database types such as regexp: or pcre: whose

#        lookup fields can match both upper and lower case.

#

# TABLE FORMAT

#        The input format for the postmap(1) command is as follows:

#

#        pattern address

#               When  pattern matches a mail address, replace it by

#               the corresponding address.

#

#        blank lines and comments

#               Empty lines and whitespace-only lines are  ignored,

#               as  are  lines whose first non-whitespace character

#               is a `#'.

#

#        multi-line text

#               A logical line starts with non-whitespace  text.  A

#               line  that starts with whitespace continues a logi-

#               cal line.

#

# TABLE SEARCH ORDER

#        With lookups from indexed files such as DB or DBM, or from

#        networked   tables   such   as  NIS,  LDAP  or  SQL,  each

#        user@domain query produces a sequence of query patterns as

#        described below.

#

#        Each  query pattern is sent to each specified lookup table

#        before trying the next query pattern,  until  a  match  is

#        found.

#

#        user@domain address

#               Replace  user@domain  by address. This form has the

#               highest precedence.

#

#               This is useful to clean up  addresses  produced  by

#               legacy  mail  systems.  It can also be used to pro-

#               duce Firstname.Lastname style  addresses,  but  see

#               below for a simpler solution.

#

#        user address

#               Replace  user@site by address when site is equal to

#               $myorigin, when site is listed  in  $mydestination,

#               or   when  it  is  listed  in  $inet_interfaces  or

#               $proxy_interfaces.

#

#               This form is useful for replacing  login  names  by

#               Firstname.Lastname.

#

#        @domain address

#               Replace other addresses in domain by address.  This

#               form has the lowest precedence.

#

#               Note: @domain is a wild-card.  When  this  form  is

#               applied  to  recipient  addresses, the Postfix SMTP

#               server accepts mail for any  recipient  in  domain,

#               regardless  of whether that recipient exists.  This

#               may  turn  your  mail  system  into  a  backscatter

#               source: Postfix first accepts mail for non-existent

#               recipients and then tries to return  that  mail  as

#               "undeliverable" to the often forged sender address.

#

# RESULT ADDRESS REWRITING

#        The lookup result is subject to address rewriting:

#

#        o      When the result  has  the  form  @otherdomain,  the

#               result becomes the same user in otherdomain.

#

#        o      When  "append_at_myorigin=yes", append "@$myorigin"

#               to addresses without "@domain".

#

#        o      When "append_dot_mydomain=yes", append ".$mydomain"

#               to addresses without ".domain".

#

# ADDRESS EXTENSION

#        When a mail address localpart contains the optional recip-

#        ient delimiter (e.g., user+foo@domain), the  lookup  order

#        becomes: user+foo@domain, user@domain, user+foo, user, and

#        @domain.

#

#        The  propagate_unmatched_extensions   parameter   controls

#        whether  an  unmatched  address extension (+foo) is propa-

#        gated to the result of table lookup.

#

# REGULAR EXPRESSION TABLES

#        This section describes how the table lookups  change  when

#        the table is given in the form of regular expressions. For

#        a description of regular expression lookup  table  syntax,

#        see regexp_table(5) or pcre_table(5).

#

#        Each  pattern  is  a regular expression that is applied to

#        the entire address being looked up. Thus, user@domain mail

#        addresses  are  not  broken up into their user and @domain

#        constituent parts, nor is user+foo broken up into user and

#        foo.

#

#        Patterns  are applied in the order as specified in the ta-

#        ble, until a pattern is  found  that  matches  the  search

#        string.

#

#        Results  are  the  same as with indexed file lookups, with

#        the additional feature that parenthesized substrings  from

#        the pattern can be interpolated as $1, $2 and so on.

#

# TCP-BASED TABLES

#        This  section  describes how the table lookups change when

#        lookups are directed to a TCP-based server. For a descrip-

#        tion of the TCP client/server lookup protocol, see tcp_ta-

#        ble(5).  This feature is not available up to and including

#        Postfix version 2.4.

#

#        Each lookup operation uses the entire address once.  Thus,

#        user@domain mail addresses are not broken  up  into  their

#        user and @domain constituent parts, nor is user+foo broken

#        up into user and foo.

#

#        Results are the same as with indexed file lookups.

#

# BUGS

#        The table format does not understand quoting  conventions.

#

# CONFIGURATION PARAMETERS

#        The  following main.cf parameters are especially relevant.

#        The text below provides  only  a  parameter  summary.  See

#        postconf(5) for more details including examples.

#

#        canonical_classes

#               What  addresses  are  subject  to canonical address

#               mapping.

#

#        canonical_maps

#               List of canonical mapping tables.

#

#        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.

#

#        propagate_unmatched_extensions

#               A list of address rewriting  or  forwarding  mecha-

#               nisms  that propagate an address extension from the

#               original address to the result.   Specify  zero  or

#               more   of   canonical,   virtual,  alias,  forward,

#               include, or generic.

#

#        Other parameters of interest:

#

#        inet_interfaces

#               The network interface addresses  that  this  system

#               receives mail on.  You need to stop and start Post-

#               fix when this parameter changes.

#

#        local_header_rewrite_clients

#               Rewrite message header addresses in mail from these

#               clients  and  update  incomplete addresses with the

#               domain name in $myorigin or $mydomain; either don't

#               rewrite  message headers from other clients at all,

#               or rewrite message headers  and  update  incomplete

#               addresses   with   the   domain  specified  in  the

#               remote_header_rewrite_domain parameter.

#

#        proxy_interfaces

#               Other interfaces that this machine receives mail on

#               by way of a proxy agent or network address transla-

#               tor.

#

#        masquerade_classes

#               List of address classes  subject  to  masquerading:

#               zero  or  more of envelope_sender, envelope_recipi-

#               ent, header_sender, header_recipient.

#

#        masquerade_domains

#               List of domains that hide  their  subdomain  struc-

#               ture.

#

#        masquerade_exceptions

#               List  of user names that are not subject to address

#               masquerading.

#

#        mydestination

#               List of domains that  this  mail  system  considers

#               local.

#

#        myorigin

#               The domain that is appended to locally-posted mail.

#

#        owner_request_special

#               Give special treatment to owner-xxx and xxx-request

#               addresses.

#

#        remote_header_rewrite_domain

#               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.

#

# SEE ALSO

#        cleanup(8), canonicalize and enqueue mail

#        postmap(1), Postfix lookup table manager

#        postconf(5), configuration parameters

#        virtual(5), virtual aliasing

#

# README FILES

#        Use "postconf readme_directory" or  "postconf  html_direc-

#        tory" to locate this information.

#        DATABASE_README, Postfix lookup table overview

#        ADDRESS_REWRITING_README, address rewriting guide

#

# 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

#

#        Wietse Venema

#        Google, Inc.

#        111 8th Avenue

#        New York, NY 10011, USA

#

#                                                                   CANONICAL(5)