Using a database in check_relay

Last Update 2003-02-22

Jan Krüger suggested to use a map lookup to list IP addresses in


check_relay

too. You need a patch for sendmail 8.8.5 to make this work (it's fixed in later versions).

# Database definition
Kjunk btree /etc/mail/junk

The map is the same as for check_mail and looks like the following:

D.X.Y.Z IP
C.X.Y IP
B.X IP
A IP

(full IP numbers, class C, B, or A nets)

SjunkIP
# lookup IP in database
# full IP address
R$-.$-.$-.$-	$: $(junk $1.$2.$3.$4 $)
# class C net
R$-.$-.$-.$-	$: $(junk $1.$2.$3 $: $1.$2.$3.$4 $)
# class B net
R$-.$-.$-.$-	$: $(junk $1.$2 $: $1.$2.$3.$4 $)
# class A net
R$-.$-.$-.$-	$: $(junk $1 $: $1.$2.$3.$4 $)

Scheck_relay
# check IP
R$+ $| $+	$: $1 $| $>junkIP $2
R$+ $| IP	$#error $@ 5.7.1 $: "no access from your IP"
# check hostname
R$+ $| $+	$: $>junk <@$1>
R$*<@$*JUNK>$*	$#error $@ 5.7.1 $: "no access from this host"

You also need the


junk

ruleset from check_mail . All of these rulesets are included in the check.tar file as HACKs for use in your .mc file.

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Disclaimer: the information provided may be inaccurate or outdated or incomplete. Please contact me if you find an error.