EXTSMAIL.EXTERNALS(1)					    BSD General Commands Manual 				     EXTSMAIL.EXTERNALS(1)

NAME

     extsmail.externals -- configure which external commands to robustly send e-mail via

DESCRIPTION

     extsmail.externals is used to configure extsmaild(1).  It consists of one or more group declarations. Each group consists of zero or more
     match / reject clauses followed by one or more external declarations. An external consists of one or more assignments of key = value pairs.

     When sending messages extsmaild(1) first searches through the externals file, in order, for a group whose match / reject clauses match the
     message in question. If a group does not contain any such clauses it automatically matches all messages. Match / reject clauses currently
     match only against headers, and use standard POSiX extended regular expressions (see re_format(7) for more details).  extsmaild(1) then tries
     each external in the group, in order, to send the message successfully.

     The grammar for this file is as follows:

	   group    ::= { matches* external+ }

	   matches  ::= match
		      | reject
	   match    ::= MATCH HEADER string
	   reject   ::= REJECT HEADER string

	   external ::= EXTERNAL ID { defn+ }

	   defn     ::= ID = STRING
		      | ID = TIME

	   TIME     ::= [0-9]+[dhms]

     Valid assignments within an external are:

     sendmail
	     Defines the external shell command used to send e-mail.

     timeout
	     If extsmaild(1) is executed in daemon mode, this value defines the length of time that extsmaild(1) will retry this external before
	     giving up and trying the next external in the group. Times are specified as a number followed by d (days), h (hours) m (minutes), or
	     s (seconds). If extsmaild(1) is executed in batch mode, the timeout value is ignored.

FILES

     The extsmail configuration file is searched for, in order, in the following locations:

     ~/.extsmail/externals
	     Per-user configuration.

     /etc/extsmail/externals
	     System-wide configuration.

EXAMPLES

     The simplest externals file sending e-mail via ssh(1) looks as follows:

	   group {
	       external mymachine {
		   sendmail = "/usr/bin/ssh -q -C -l user mymachine.net /usr/sbin/sendmail"
	       }
	   }
     where mymachine is a human-friendly name given to an external (it does not effect processing), and user is the username on the remote machine
     mymachine.net.

     A more complex example using multiple groups, message matching, and multiple external commands looks as follows:

	   group {
	       match header "^To:.*@foo.com"

	       external foo {
		   sendmail = "/usr/bin/ssh -q -C -l user shell.foo.com /usr/sbin/sendmail"
	       }
	   }

	   group {
	       external mymachine {
		   sendmail = "/usr/bin/ssh -q -C -l user mymachine.net /usr/sbin/sendmail"
	       }

	       external bk {
		   sendmail = "/usr/bin/ssh -q -C -l user bk.mymachine.net /usr/sbin/sendmail"
	       }
	   }

SEE ALSO

     extsmail(1), extsmail.conf(5), extsmaild(1)

AUTHORS

     Laurence Tratt <http://tratt.net/laurie/>

BSD
								 November 2, 2008							       BSD