1divert(-1) 2# 3# Copyright (c) 1998-2000 Proofpoint, Inc. and its suppliers. 4# All rights reserved. 5# Copyright (c) 1983 Eric P. Allman. All rights reserved. 6# Copyright (c) 1988, 1993 7# The Regents of the University of California. All rights reserved. 8# 9# By using this file, you agree to the terms and conditions set 10# forth in the LICENSE file which can be found at the top level of 11# the sendmail distribution. 12# 13# 14 15divert(0) 16VERSIONID(`$Id: bestmx_is_local.m4,v 8.27 2013-11-22 20:51:11 ca Exp $') 17divert(-1) 18 19define(`_BESTMX_IS_LOCAL_', _ARG_) 20 21LOCAL_CONFIG 22# turn on bestMX lookup table 23Kbestmx bestmx 24ifelse(defn(`_ARG_'), `', `dnl',` 25# limit bestmx to these domains 26CB`'_ARG_') 27 28LOCAL_NET_CONFIG 29 30# If we are the best MX for a site, then we want to accept 31# its mail as local. We assume we've already weeded out mail to 32# UUCP sites which are connected to us, which should also have 33# listed us as their best MX. 34# 35# Warning: this may generate a lot of extra DNS traffic -- a 36# lower cost method is to list all the expected best MX hosts 37# in $=w. This should be fine (and easier to administer) for 38# low to medium traffic hosts. If you use the limited bestmx 39# by passing in a set of possible domains it will improve things. 40 41ifelse(defn(`_ARG_'), `', `dnl 42# unlimited bestmx 43R$* < @ $* > $* $: $1 < @ $2 @@ $(bestmx $2 $) > $3', 44`dnl 45# limit bestmx to $=B 46R$* < @ $* $=B . > $* $: $1 < @ $2 $3 . @@ $(bestmx $2 $3 . $) > $4') 47R$* $=O $* < @ $* @@ $=w . > $* $@ $>Recurse $1 $2 $3 48R< @ $* @@ $=w . > : $* $@ $>Recurse $3 49dnl we cannot use _LOCAL_ here since it is defined too late 50R$* < @ $* @@ $=w . > $* $@ $>CanonLocal < $1 > 51R$* < @ $* @@ $* > $* $: $1 < @ $2 > $4 52