Ubuntu Feisty 7.04 manual page repository

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Provided by: postfix_2.3.8-2_i386

 

NAME

        aliases - Postfix local alias database format
 

SYNOPSIS

        newaliases
aliases(5) table provides a system-wide mechanism to redirect mail
        for local recipients. The redirections are  processed  by  the  Postfix
local(8) delivery agent.
 
aliases(5) table is specified as a text file that serves
postalias(1) command. The result, an  indexed  file  in
        dbm  or  db format, is used for fast lookup by the mail system. Execute
        the command newaliases in order  to  rebuild  the  indexed  file  after
        changing the Postfix alias database.
 
        The  input  and  output file formats are expected to be compatible with
        Sendmail version 8, and are expected to be suitable for the use as  NIS
        maps.
 
        Users  can  control  delivery  of their own mail by setting up .forward
        files in their home directory.  Lines in per-user .forward  files  have
aliases(5) entries.
 
        The format of the alias database input file is as follows:
 
        ·      An alias definition has the form
 
                    name: value1, value2, ...
 
        ·      Empty  lines and whitespace-only lines are ignored, as are lines
               whose first non-whitespace character is a ‘#’.
 
        ·      A logical line starts with  non-whitespace  text.  A  line  that
               starts with whitespace continues a logical line.
 
        The  name  is a local address (no domain part).  Use double quotes when
        the name contains any special characters such as whitespace, ‘#’,  ‘:’,
        or  ‘@’.  The  name  is  folded to lowercase, in order to make database
        lookups case insensitive.
 
        In addition, when an alias exists for owner-name, delivery  diagnostics
        are  directed to that address, instead of to the originator of the mes‐
        sage.  This is typically used to direct delivery errors  to  the  main‐
        tainer  of  a  mailing  list,  who is in a better position to deal with
        mailing list delivery problems than the originator of  the  undelivered
        mail.
 
        The value contains one or more of the following:
 
        address
               Mail  is  forwarded to address, which is compatible with the RFC
               822 standard.
 
        /file/name
local(8)  for  details  of
               delivery  to  file.   Delivery  is not limited to regular files.
               For  example,  to  dispose  of  unwanted  mail,  deflect  it  to
               /dev/null.
 
        |command
               Mail  is piped into command. Commands that contain special char‐
               acters, such as whitespace, should be  enclosed  between  double
local(8) for details of delivery to command.
 
               When  the  command  fails, a limited amount of command output is
               mailed back to the  sender.   The  file  /usr/include/sysexits.h
               defines  the expected exit status codes. For example, use |"exit
               67" to simulate a "user unknown" error, and |"exit 0" to  imple‐
               ment an expensive black hole.
 
        :include:/file/name
               Mail  is  sent  to  the  destinations  listed in the named file.
               Lines in :include: files have the same syntax as the  right-hand
               side of alias entries.
 
               A  destination  can be any destination that is described in this
               manual page. However, delivery to "|command" and  /file/name  is
               disallowed  by  default.  To enable, edit the allow_mail_to_com     
               mands and allow_mail_to_files configuration parameters.
        When alias database search fails, and the recipient localpart  contains
        the  optional  recipient  delimiter  (e.g.,  user+foo),  the  search is
        repeated for the unextended address (e.g., user).
 
        The  propagate_unmatched_extensions  parameter  controls   whether   an
        unmatched address extension (+foo) is propagated to the result of table
        lookup.
local(8) delivery agent always folds the search string to lowercase
        before database lookup.
local(8)  delivery agent disallows regular expression substitution
        of $1 etc. in alias_maps, because that would open a security hole.
 
local(8) delivery agent will silently ignore requests  to  use  the
proxymap(8)  server  within  alias_maps. Instead it will open the table
local(8) delivery agent will
        terminate with a fatal error.
        The  following  main.cf  parameters  are especially relevant.  The text
postconf(5)  for  more
        details including examples.
 
        alias_database
newaliases(1)
               command.
 
        alias_maps
local(8) delivery  agent.
 
        allow_mail_to_commands
               Restrict the usage of mail delivery to external command.
 
        allow_mail_to_files
               Restrict the usage of mail delivery to external file.
 
        expand_owner_alias
               When  delivering to an alias that has an owner- companion alias,
               set the envelope sender address to the right-hand  side  of  the
               owner alias, instead using of the left-hand side address.
 
        propagate_unmatched_extensions
               A list of address rewriting or forwarding mechanisms that propa‐
               gate an address extension  from  the  original  address  to  the
               result.  Specify zero or more of canonical, virtual, alias, for     
               ward, include, or generic.
 
        owner_request_special
               Give special treatment to  owner-listname  and  listname-request
               addresses.
 
        recipient_delimiter
               Delimiter that separates recipients from address extensions.
 
        Available in Postfix version 2.3 and later:
 
        frozen_delivered_to
local(8) delivery agent’s Delivered-To: address (see
               prepend_delivered_header) only once, at the start of a delivery;
               do  not update the Delivered-To: address while expanding aliases
               or .forward files.
 

STANDARDS

        RFC 822 (ARPA Internet Text Messages)
local(8), local delivery agent
newaliases(1), create/update alias database
postalias(1), create/update alias database
postconf(5), configuration parameters
        Use "postconf readme_directory" or "postconf html_directory" to  locate
        this information.
        DATABASE_README, Postfix lookup table overview
 

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
 
ALIASES(5)
 

Sections

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