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Spam Detection Reaches Near 100% Efficiency by Combining Multiple Technologies

By chaining together multiple types of technologies it is possible to reach near 100% spam detection.

(PRWEB) September 15, 2004 -- "Many spam filters rely on a single proprietary approach when analyzing email messages for spam," said Henrik Hellerstedt, Messagewash's CTO, "which apart from the problems with any single approach being 100% effective, makes spammers more likely to target and defeat it should it be too effective."

Instead you should use a broad approach, using as many tests as possible - getting as many indicators as possible that a message might be spam. If a spam detection technique is defeated by spammers, many remain.

Although this approach is much more resource intense, the end result is worth it. Messagewash uses thousands of tests in a 6 step filtering approach with very good results. A customer evaluating Messagewash reached 99.7% accuracy, with only 1 spam out of 3000 not being flagged as spam.

Messagewash uses a chain of all available spam detection techniques and more are added as they are proven effective. Techniques that spammers have defeated are easily removed from the chain as they no longer serve a purpose.

Bayesian logic has been a buzzword in the anti spam industry for years, but spammers have now proven it can be defeated or at least severely crippled by poisoning its database, Hellerstedt said. "Spammers add carefully chosen, seemingly arbitrary, words and sentences to their spam messages which makes it very difficult for the Bayesian algorithm to classify the message. Since many spam filters are built solemnly on bayesian logic this has made them practically useless."

Messagewash uses bayesian logic but in Messagewashs´s chain of techniques it plays a minor role. It cannot alone classify a message as spam, several other tests need to have triggered for this to occur.

Messagewash can be evaluated freely for 30 days and prices start at $1 at http://www.messagewash.com

Messagewash is a leader in managed email protection services. The company scans and cleans email before delivering it to its customers, using 5 different anti-virus engines and a 6 step spam filtering technique with thousands of individual tests, making it a world leader in virus and spam protection.