From: Roy Badami
Subject: Sendmail fix

The following works for me (only very lightly tested).  Note that (as
usual with sendmail rules) tabs are significant.  The LHS and RHS of
each rule must be separated by tabs, not spaces.  Also, this assumes
you don't already have a Local_check_mail ruleset; if you do, then
care will need to be taken in mergeing them (ie you have to understand
what sendmail rulesets do :)

	-roy

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LOCAL_CONFIG
Kdnsa dns -R A -a<OKR> -T<TEMP>
C{evil_ip}64.94.110.11

LOCAL_RULESETS
SLocal_check_mail
R $*					$: $>canonify $1
R $* < @ $+ . > $*			$1 < @ $2 > $3
R $* < @ $+ > $*			$: $1 < @ $(dnsa $2 $) > $3
R $* < @ $={evil_ip} <OKR> > $*		$#error $@ 5.1.8 $: "553 Domain of sender address " $&f " does not exist"