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