Well, this patent (#6,732,157) certainly won't hold up. Too much prior art. We were doing this at SimpleFilter before they even filed their patent in 2002.
Network Associates is granted broad anti-spam patent Network Associates Inc. (NAI) has been granted a broad U.S. patent for technology covering “various computer program products, systems and methods” for filtering unwanted e-mail messages, it said Tuesday.
It is about as useful as patent #6,373,244 (“Apparatus for scraping a surface indicating elements located inwardly of the surface”). Or in laymans terms, transverse asswiping.
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