1c2aa98e2SPeter Wemmdivert(-1) 2c2aa98e2SPeter Wemm# 35dd76dd0SGregory Neil Shapiro# Copyright (c) 1998-2000 Proofpoint, Inc. and its suppliers. 406f25ae9SGregory Neil Shapiro# All rights reserved. 5c2aa98e2SPeter Wemm# Copyright (c) 1983 Eric P. Allman. All rights reserved. 6c2aa98e2SPeter Wemm# Copyright (c) 1988, 1993 7c2aa98e2SPeter Wemm# The Regents of the University of California. All rights reserved. 8c2aa98e2SPeter Wemm# 9c2aa98e2SPeter Wemm# By using this file, you agree to the terms and conditions set 10c2aa98e2SPeter Wemm# forth in the LICENSE file which can be found at the top level of 11c2aa98e2SPeter Wemm# the sendmail distribution. 12c2aa98e2SPeter Wemm# 13c2aa98e2SPeter Wemm# 14c2aa98e2SPeter Wemm 15c2aa98e2SPeter Wemmdivert(0) 16*4313cc83SGregory Neil ShapiroVERSIONID(`$Id: bestmx_is_local.m4,v 8.27 2013-11-22 20:51:11 ca Exp $') 17c2aa98e2SPeter Wemmdivert(-1) 18c2aa98e2SPeter Wemm 1940266059SGregory Neil Shapirodefine(`_BESTMX_IS_LOCAL_', _ARG_) 20065a643dSPeter Wemm 21c2aa98e2SPeter WemmLOCAL_CONFIG 22c2aa98e2SPeter Wemm# turn on bestMX lookup table 23c2aa98e2SPeter WemmKbestmx bestmx 2406f25ae9SGregory Neil Shapiroifelse(defn(`_ARG_'), `', `dnl',` 25c2aa98e2SPeter Wemm# limit bestmx to these domains 26c2aa98e2SPeter WemmCB`'_ARG_') 27c2aa98e2SPeter Wemm 28c2aa98e2SPeter WemmLOCAL_NET_CONFIG 29c2aa98e2SPeter Wemm 30c2aa98e2SPeter Wemm# If we are the best MX for a site, then we want to accept 31c2aa98e2SPeter Wemm# its mail as local. We assume we've already weeded out mail to 32c2aa98e2SPeter Wemm# UUCP sites which are connected to us, which should also have 33c2aa98e2SPeter Wemm# listed us as their best MX. 34c2aa98e2SPeter Wemm# 35c2aa98e2SPeter Wemm# Warning: this may generate a lot of extra DNS traffic -- a 36c2aa98e2SPeter Wemm# lower cost method is to list all the expected best MX hosts 37c2aa98e2SPeter Wemm# in $=w. This should be fine (and easier to administer) for 38c2aa98e2SPeter Wemm# low to medium traffic hosts. If you use the limited bestmx 39c2aa98e2SPeter Wemm# by passing in a set of possible domains it will improve things. 40c2aa98e2SPeter Wemm 4106f25ae9SGregory Neil Shapiroifelse(defn(`_ARG_'), `', `dnl 42c2aa98e2SPeter Wemm# unlimited bestmx 43c2aa98e2SPeter WemmR$* < @ $* > $* $: $1 < @ $2 @@ $(bestmx $2 $) > $3', 44c2aa98e2SPeter Wemm`dnl 45c2aa98e2SPeter Wemm# limit bestmx to $=B 46c2aa98e2SPeter WemmR$* < @ $* $=B . > $* $: $1 < @ $2 $3 . @@ $(bestmx $2 $3 . $) > $4') 4706f25ae9SGregory Neil ShapiroR$* $=O $* < @ $* @@ $=w . > $* $@ $>Recurse $1 $2 $3 4806f25ae9SGregory Neil ShapiroR< @ $* @@ $=w . > : $* $@ $>Recurse $3 4906f25ae9SGregory Neil Shapirodnl we cannot use _LOCAL_ here since it is defined too late 5006f25ae9SGregory Neil ShapiroR$* < @ $* @@ $=w . > $* $@ $>CanonLocal < $1 > 51c2aa98e2SPeter WemmR$* < @ $* @@ $* > $* $: $1 < @ $2 > $4 52