In April, we started to go through our spamtraps (E-mail addresses designed to collect spam), to find out which spam tests were most effective at catching spam. The results this month are based on just under 10,000 spams that were received, all in August, 2002. In August, our spamtraps received 15% more spam than July (July was about 15% higher than June, as well).
The following is a list of tests that we run against the E-mails arriving at the spamtrap, and what percentage of the spam they caught (it will be easier to read if you use a fixed-width font): WEIGHT10 95.24% WEIGHT20 88.70% SNIFFER 84.65% SPAMCOP 75.16% XBL 56.61% SPAMHEADERS 49.53% REVDNS 46.84% NJABL 39.46% MONKEYPROXIES 38.25% POSTFIXGATE 35.22% HELO 30.47% DSBLALL 30.21% HEUR10 27.98% BADHEADERS 27.62% DSBL 27.23% NOPOSTMASTER 26.97% NOABUSE 26.10% OSRELAY 22.42% OSPROXY 22.23% ORDB 21.87% OSSRC 21.77% DORKZTL 19.90% RSL 18.49% BLARSBL 14.13% ROUTING 13.65% DORKS 12.57% DEVNULL 11.61% KUNDENSERVER 11.09% DNSRBL-SPAM 10.84% IPWHOIS 10.79% BLITZEDHTTP 9.84% SPAMHAUS 9.45% BLITZEDALL 8.19% BLITZEDSOCKS 7.47% MAILDEFLECTOR 5.33% BADWHOIS 5.31% DSN 4.53% OSSOFT 4.34% FABELSOURCES 3.48% DNSRBL-DUN 3.03% KITHRUP 2.39% DSBLMULTI 2.00% MAILFROM 1.94% NJABLDUL 1.48% COMPU 1.05% PIGS 1.03% OSDUL 0.98% DORKRELAYS 0.84% DELINK 0.68% MONKEYFORMMAIL 0.63% BLITZEDWINGATE 0.57% ABL 0.49% DNSUCE 0.17% OSSMART 0.01% The WEIGHT10 and WEIGHT20 tests are just a weighting system that assigns a weight to each E-mail, based on the spam tests that fail, so they don't really count as spam tests by themselves (although they do catch the most spam). The two best tests by far are SNIFFER ( http://www.sortmonster.com ) at 84.65% and SPAMCOP ( http://www.spamcop.net ) at 75.16%. More information on most of the various spam tests shown above can be found at http://www.declude.com/junkmail/support/ip4r.htm . You can look up an IP address using the Spam Database Lookup tool at http://www.DNSstuff.com . The most recent 20 spams in our spamtraps, and the tests they failed, can be found at http://www.declude.com/spamtrap.htm . -Scott --- Declude: Anti-virus, Anti-spam and Anti-hijacking solutions for IMail. http://www.declude.com --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
