Re: [cobalt-users] [RaQ4] Sendmail anti-spam configuration

["Ian Gibbons" <cobalt-users1@xxxxxxxxxxxxx>]

On 6 Feb 2004 at 13:10, oxfordmusic.net wrote:

> ok, so i finally managed to add some DNSBL checks to my sendmail and get it
> started again (with a little help from Jeff Lasman, cheers!). but scanning
> my logs and checking my email, it doesn't look like its blocking any spam.
> any ideas where i've gone wrong?
> 
> the lines i added to sendmail.cf:
> # DNS based IP address spam list sbl.spamhaus.org
> R$*                     $: $&{client_addr}
> R::ffff:$-.$-.$-.$-     $: <?> $(host $4.$3.$2.$1.sbl.spamhaus.org. $: OK $)
> R$-.$-.$-.$-            $: <?> $(host $4.$3.$2.$1.sbl.spamhaus.org. $: OK $)
> R<?>OK                  $: OKSOFAR
> R<?>$+                  $#error $@ 5.7.1 $: Rejected as possible spam
> (spamhaus) - please contact $

<snip>

Hi,

This is what we have on Redhat/ Sendmail 8.12... 

# DNS based IP address spam list sbl.spamhaus.org
R$*			$: $&{client_addr}
R$-.$-.$-.$-		$: <?> $(ednsbl $4.$3.$2.$1.sbl.spamhaus.org. $: OK $)
R<?>OK			$: OKSOFAR
R<?>$+<TMP>		$: TMPOK
R<?>127.0.0.2.	$#error $@ 5.7.1 $: "550 Rejected: " $&{client_addr} " listed at 
sbl.spamhaus.org"

Which works well. (the last 2 lines are actually 1 wrapped. )

To check your maillog use the command:

tail -n 1000 /var/log/maillog | grep Rejected

which checks the last 1000 line of the maillog

or 

tail -f /var/log/maillog | grep Rejected

To check in real time ( CTRL-C to quit)

Regards

Ian
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