On Tuesday, September 3, 2002, at 10:25  AM, Global Homes Webmaster 
wrote:

> On 09/03/02 at 08:24, James Strickland wrote:
> <snip>

> I have hundreds of IP addresses blacklisted, but since many spammers
>> use mutliple servers it is a nearly impossible task to make a dent in
>> the amount of spam received using that method. I also subscribe to
>> three different blacklists. Unfortunately, I have only seen a small
>> drop in spam with these blacklists, but I have had quite a few
>> clients and vendors blocked. Any help would be greatly appreciated.
>
> What blacklists do you use? I've found the Osirusoft list (all 
> sub-lists
> except for SPEWS and Smart Hosts), supplemented by ORDB,
> korea.services.net, along with my internal list based on spam that I 
> and my
> users have received, to be a pretty good combination for my situation. 
> They
> at least keep the spam down to a dull roar with little or no collateral
> damage.
>
> Of course, some spam is always going to get through no matter how 
> closely
> guarded your mail server is, because blacklists and other anti-spam
> measures are necessarily reactive. They guard against where the 
> spammers
> are known to be and techniques that they are known to use. As the 
> spammers
> move from network to network and find ways to get around anti-spam
> defenses, they're always going to be a step ahead.
>

In my RBL server list I have:
relays.osirusoft.com     "Please see http://relays.osirusoft.com/";
korea.services.net  "Please see http://korea.services.net/";

And in my Blacklisted server list I have:
127.0.0.2             ; orisoft verified open relay
127.0.0.3             ; orisoft dialup line

Between these, I seem to block about 90% of the spam with, as best I 
can tell so far, no collateral damage. That still lets a lot through. I 
am now training the spam detector in Jaguar's Mail.app and it is 
getting pretty good at detecting the remaining spam. I have hopes that 
the techniques used by mail app (which I believe are similar to those 
described at <http://www.paulgraham.com/spam.html> ) will make a 
significant dent in spammer's success rates. I am almost tempted to 
turn off the RBL lookup in SIMS just to give Mail.app more data to 
train with. Unfortunately, I am the only one using OS 10.2 and turning 
off the RBLs will really hurt the other users of the system.


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