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ALIASES(5)		      File Formats Manual		    ALIASES(5)

       aliases - aliases file for sendmail


       This file describes user	ID aliases used	by sendmail.  The file resides
       in /etc/mail and	is formatted as	a series of lines of the form

	      name: addr_1, addr_2, addr_3, . .	.

       The name	is the name to alias, and the addr_n are the aliases for  that
       name.  addr_n can be another alias, a local username, a local filename,
       a command, an include file, or an external address.

       Local Username

	      The username must	be available via getpwnam(3).

       Local Filename

	      Messages are appended to the file	specified by the full pathname
	      (starting	with a slash (/))


	      A	 command  starts  with a pipe symbol (|), it receives messages
	      via standard input.

       Include File
	      :include:	/path/name

	      The aliases in pathname are added	to the aliases for name.

       E-Mail Address

	      An e-mail	address	in RFC 822 format.

       Lines beginning with white space	are continuation lines.	  Another  way
       to  continue lines is by	placing	a backslash directly before a newline.
       Lines beginning with # are comments.

       Aliasing	occurs only on local names.  Loops can	not  occur,  since  no
       message will be sent to any person more than once.

       If  an  alias  is found for name, sendmail then checks for an alias for
       owner-name.  If it is found and the result of the lookup	expands	 to  a
       single address, the envelope sender address of the message is rewritten
       to that address.	 If it is found	and the	result expands	to  more  than
       one address, the	envelope sender	address	is changed to owner-name.

       After  aliasing	has  been  done, local and valid recipients who	have a
       ``.forward'' file in their home directory have  messages	 forwarded  to
       the list	of users defined in that file.

       This  is	 only  the  raw	 data file; the	actual aliasing	information is
       placed into a binary format in the file /etc/mail/aliases.db using  the
       program	newaliases(1).	 A  newaliases command should be executed each
       time the	aliases	file is	changed	for the	change to take effect.

       newaliases(1), dbm(3), dbopen(3), db_open(3), sendmail(8)

       SENDMAIL	Installation and Operation Guide.

       SENDMAIL	An Internetwork	Mail Router.

       If you have compiled sendmail with DBM support instead  of  NEWDB,  you
       may  have  encountered problems in dbm(3) restricting a single alias to
       about 1000 bytes	 of  information.   You	 can  get  longer  aliases  by
       ``chaining'';  that is, make the	last name in the alias be a dummy name
       which is	a continuation alias.

       The aliases file	format appeared	in 4.0BSD.

			 $Date:	2013-11-22 20:51:55 $		    ALIASES(5)


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