Postini Adds New Anti-Spam Techniques

By Cameron Sturdevant  |  Posted 2004-07-26 Print this article Print

The company now gauges e-mail senders' past behavior to ferret out spam.

Anti-spam service provider Postini has added sender behavior to its techniques for stopping junk mail. The company is identifying spam sources by tracking in real time the spammers IP address—the one part of an e-mail message that cannot be spoofed.

Earlier this month, Postini reported that tracking sender behavior had enabled its service to block 53 percent of e-mail connections without having to read the message to determine that it was unwanted.

IT managers should be interested in the approach Postini is taking for two reasons. First, blocking e-mail connection requests based on the senders past bad behavior is part and parcel of the move to sender-authentication anti-spam proposals that will likely start to take shape later this year.

Second, Symantec, which recently finished its acquisition of Brightmail, just bought TurnTide, which makes a product that also monitors sender behavior to determine who is naughty or nice using a technique similar to that used by Postini.

Symantec and Postini are angling to move identification of spam sources further away from recipients, a move in the right direction for stopping spam. Read Postinis report at press/pr/pr070604.html.

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Cameron Sturdevant Cameron Sturdevant is the executive editor of Enterprise Networking Planet. Prior to ENP, Cameron was technical analyst at PCWeek Labs, starting in 1997. Cameron finished up as the eWEEK Labs Technical Director in 2012. Before his extensive labs tenure Cameron paid his IT dues working in technical support and sales engineering at a software publishing firm . Cameron also spent two years with a database development firm, integrating applications with mainframe legacy programs. Cameron's areas of expertise include virtual and physical IT infrastructure, cloud computing, enterprise networking and mobility. In addition to reviews, Cameron has covered monolithic enterprise management systems throughout their lifecycles, providing the eWEEK reader with all-important history and context. Cameron takes special care in cultivating his IT manager contacts, to ensure that his analysis is grounded in real-world concern. Follow Cameron on Twitter at csturdevant, or reach him by email at

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