bestmx_is_local.m4 revision 43730 
1divert(-1)
2#
3# Copyright (c) 1998 Sendmail, Inc.  All rights reserved.
4# Copyright (c) 1983 Eric P. Allman.  All rights reserved.
5# Copyright (c) 1988, 1993
6#	The Regents of the University of California.  All rights reserved.
7#
8# By using this file, you agree to the terms and conditions set
9# forth in the LICENSE file which can be found at the top level of
10# the sendmail distribution.
11#
12#
13
14divert(0)
15VERSIONID(`@(#)bestmx_is_local.m4	8.14 (Berkeley) 1/25/1999')
16divert(-1)
17
18define(_BESTMX_IS_LOCAL_, _ARG_)
19
20LOCAL_CONFIG
21# turn on bestMX lookup table
22Kbestmx bestmx
23ifelse(_ARG_, `', `dnl',`
24# limit bestmx to these domains
25CB`'_ARG_')
26
27LOCAL_NET_CONFIG
28
29# If we are the best MX for a site, then we want to accept
30# its mail as local.  We assume we've already weeded out mail to
31# UUCP sites which are connected to us, which should also have
32# listed us as their best MX.
33#
34# Warning: this may generate a lot of extra DNS traffic -- a
35# lower cost method is to list all the expected best MX hosts
36# in $=w.  This should be fine (and easier to administer) for
37# low to medium traffic hosts.  If you use the limited bestmx
38# by passing in a set of possible domains it will improve things.
39
40ifelse(_ARG_, `', `dnl
41# unlimited bestmx
42R$* < @ $* > $*			$: $1 < @ $2 @@ $(bestmx $2 $) > $3',
43`dnl
44# limit bestmx to $=B
45R$* < @ $* $=B . > $*		$: $1 < @ $2 $3 . @@ $(bestmx $2 $3 . $) > $4')
46R$* $=O $* < @ $* @@ $=w . > $*	$@ $>97 $1 $2 $3
47R< @ $* @@ $=w . > : $*		$@ $>97 $3
48R$* < @ $* @@ $=w . > $*	$#local $: $1
49R$* < @ $* @@ $* > $*		$: $1 < @ $2 > $4
50