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April 12, 2004

MailFrontier, NAI update spam filters

Network Associates Inc and MailFrontier Inc both yesterday released updates to their respective spam-filtering offerings, NAI adding Bayesian algorithms to its software, and MailFrontier adding NAI's anti-virus engine, among other upgrades.

By CBR Staff Writer

MailFrontier yesterday announced the gold release of version 3.0 of its Enterprise Gateway software. As well as building in NAI’s McAfee virus scanning engine, the company has added features that stop the spam problems some AV engines cause.

Sometimes, antivirus software bounces back email determined to have viruses attached. During a prolific worm outbreak, these bouncebacks are almost as much of a burden as the virus itself. MailFrontier said its Enterprise Gateway blocks these bouncebacks.

The company also said it is among the first to support the Sender Policy Framework, a method of helping recipients authenticate sending email servers by publishing a list of IP addresses. MailFrontier says about 10,000 companies have so far published SPF profiles.

We’re not religious here, said MailFrontier’s director of product management Gleb Budman. If Caller ID, or DomainKeys, or any IETF standard should come along, we’d support those too. It’s just that today is the only one with legs at the moment.

Another new feature in 3.0 is the ability to throttle bandwidth from spamming email servers, Budman said. The software can slow down handshakes with spam servers, in order to get the server to time-out and quit the spam attack.

Meanwhile NAI played catch-up, adding Bayesian-based statistical analysis algorithms, a feature of many of its competitors for some time, to its SpamKiller software. Other filtering mechanisms include heuristics, keywords, blacklists and header analysis.

This article is based on material originally published by ComputerWire

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