Negative Positive
Title: useless method
Review: Piazza claims that the user can effectively apply a client-side filter against incoming messages; to block spam. He suggests using a typical email client like Microsoft Outlook or Lotus Notes, and using a filter againt the subject line. So you [the user] can block against subjects that a spammer might write.This "solution" was ineffective when it was written in 2002, let alone now. Don't be fooled by it. Spammers have known from the get-go to write messages with multiple subject lines. So that a given message, with a given body, can have many, many subjects. One way is to randomly add characters at the end of a (long) subject. Or to generate phrases from a dictionary. Or to use deliberately innocuous and ambiguous phrases; some of which you might get from your actual collegues or friends.
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