Imported Upstream version 8.8.8upstream/8.8.8

1 files changed, 66 insertions, 0 deletions

diff --git a/cf/feature/bestmx_is_local.m4 b/cf/feature/bestmx_is_local.m4
new file mode 100644
index 0000000..3849623
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+++ b/cf/feature/bestmx_is_local.m4
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+divert(-1)
+#
+# Copyright (c) 1983 Eric P. Allman
+# Copyright (c) 1988, 1993
+#	The Regents of the University of California.  All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. All advertising materials mentioning features or use of this software
+#    must display the following acknowledgement:
+#	This product includes software developed by the University of
+#	California, Berkeley and its contributors.
+# 4. Neither the name of the University nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+divert(0)
+VERSIONID(`@(#)bestmx_is_local.m4	8.5 (Berkeley) 3/28/97')
+divert(-1)
+
+LOCAL_CONFIG
+# turn on bestMX lookup table
+Kbestmx bestmx
+
+# limit bestmx to these domains
+CB`'_ARG_
+
+LOCAL_NET_CONFIG
+
+# If we are the best MX for a site, then we want to accept
+# its mail as local.  We assume we've already weeded out mail to
+# UUCP sites which are connected to us, which should also have
+# listed us as their best MX.
+#
+# Warning: this may generate a lot of extra DNS traffic -- a
+# lower cost method is to list all the expected best MX hosts
+# in $=w.  This should be fine (and easier to administer) for
+# low to medium traffic hosts.  If you use the limited bestmx
+# by passing in a set of possible domains it will improve things.
+
+ifelse(_ARG_, `', `', `#')dnl		unlimited bestmx
+R$* < @ $* > $*			$: $1 < @ $2 @@ $(bestmx $2 $) > $3
+ifelse(_ARG_, `', `#', `')dnl		limit bestmx to $=B
+R$* < @ $* $=B . > $*		$: $1 < @ $2 $3 . @@ $(bestmx $2 $3 . $) > $4
+R$* $=O $* < @ $* @@ $=w . > $*	$@ $>97 $1 $2 $3
+R$* < @ $* @@ $=w . > $*	$#local $: $1
+R$* < @ $* @@ $* > $*		$: $1 < @ $2 > $4