[SURBL-Discuss] RE: Start an IP list to block?

Chris Santerre csanterre at merchantsoverseas.com
Fri Sep 10 16:27:06 CEST 2004

>-----Original Message-----
>From: Matt Kettler [mailto:mkettler at evi-inc.com]
>Sent: Thursday, September 09, 2004 5:53 PM
>To: Chris Santerre; SURBL Discussion list (E-mail)
>Cc: Spamassassin-Talk (E-mail)
>Subject: RE: Start an IP list to block?
>At 05:23 PM 9/9/2004, Chris Santerre wrote:
>>OOOOOOHHHHH yeah! I didn't know that! Are we sure this is 
>actually what it
>>means and not just a miss-syntaxed paragraph? It actually 
>resolves the IP
>>against the RBL lookup?
>>If so....well then...problem solved, and devs get a cookie :)
>Actually, upon closer read it checks the IP of the NS record.. So it's 
>essentially blacklisting the IP's of the DNS servers that 
>spammers are using.
>So, for http://www.merchantsoverseas.com, it would look at 
>your NS records:
>         MerchantsOverseas.com.  18185   IN      NS      
>         MerchantsOverseas.com.  18185   IN      NS      
>And would check the IPs (auth20.ns.wcom.com) and 
>  (auth10.ns.wcom.com)  

WOW! I think this would hit more FPs then listing the IP! Am I wrong there!
I would never list the name server, as they may be hosting for much more
then just a spammer. That number is sure to be greater then a virtual hosts
number for an IP. Maybe I'm missing something key?

You won't see me ever add an NS IP to SURBL. Now that I've had time to think
of it. 


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