Be a little careful with spamcop, they'll block all the spam, along with a *really* good chunk of legitimate users. We use a custom-built weighted system, requiring the spam to fail against several combinations of rules before it's actually bit-bucketed. We test against some 10,000 daily-evolving rules and about 20 external databases and RBLs. (All this while two independent engines are scanning it for viruses and performing virus heuristic tests).
This is a tad overkill for most uses, as it requires some very careful performance tuning and quite a bit of expense, however we actually market the filtering service to businesses and ISPs. Going "overkill" is the only way I feel safe filtering spam, but your results may vary. Just beware of spamcop. ;) Jonathan At 11:06 PM 6/14/2002 -0400, you wrote: >Per multiple requests... > >OK, thanks to some great advice I got here, I have now tested my Jumpin' >GNAT Flash + the use of some free anti-spam lists for about a week and am >pleased to report that I have literally gutted the spammers on the 10 >domains that tested with us. Some still gets through, but it seems to only >be the "legit" spammers that will actually pull you off if you ask. > >What We Did: >-------------- >We enabled the email proxy, set it to "match against MX", then we changed >the MX records for the test domains to point to the IP of the External >Interface, and entered the following 4 free blacklist names in the order >shown. > >relays.ordb.org >sbl.spamhaus.org >relays.osirusoft.com >bl.spamcop.net > >The Results: >------------ >Results improved over the first 48 hours (as cached DNS records were letting >some spam around the GNAT box and we did not change the IP's of the real >smtp boxes) We have blocked over 400 SPAM losers in the last 3 days and made >for some very happy customers (testers). So far we have also not had even >one single report of ANY lost email (that was wanted). > >A Laughing Matter :-) >---------------------- >One lame spammer actually used a real account to "warn" one of our customers >that we were blocking him... > >"Your ISP is using an incompatible mail system that is keeping you from >receiving your hot stock updates newsletter from us. This may cause you to >lose valuable time in this critical market. You should ask your ISP to turn >off this new non-standards-compliant feature so that you may begin receiving >your newsletter again." > >No kidding, the customer was elated! I couldn't have paid for a better >plug! > >Thanks for all the help from this list!!! >-Vaughn Thurman > >GNAT BOX RULES!!!!! > > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [EMAIL PROTECTED] >To subscribe to the digest version first unsubscribe, then > e-mail: [EMAIL PROTECTED] >For additional commands, e-mail: [EMAIL PROTECTED] >Archive of the last 1000 messages: > http://www.mail-archive.com/[email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] To subscribe to the digest version first unsubscribe, then e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Archive of the last 1000 messages: http://www.mail-archive.com/[email protected]
