Discussion of a new movement to enhance SMTP with something called SPF (sender policy format). Also discusses other research efforts around spam...

IBM Research is currently developing a spam filter that has been nearly 100 percent effective at catching spam, Wegman said. The filter takes into account content, delivery patterns and other factors that Wegman declined to name. ... As for IBM Research's spam filter project, Wegman cautioned that it's only being tested within IBM Research and has yet to be used in a true real-world setting. But its performance so far has been too good for product people at IBM's Lotus Software division to ignore, he said.
Link: eWeek: New Anti-spam Initiative Gaining Traction >

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