How Gmail's spam filter works

Gmail does a marvelous job at keeping spam out of its users' INBOX—probably the best among free spam filters (and better than some paid ones, too). But they have not said anything publicly about how they're doing it or how effective it is until now.

These are the four elements that make Gmail's spam filter tick:

  • Gmail users participation
  • Google's compute grid
  • Other Google technologies
  • Sender verification
You could read the full article, or watch Brad Taylor, Gmail's top spam fighting engineer, talk about their techniques in this educational video:

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I currently live in San Francisco Bay Area. For the past seven years, I have been designing and building messaging solutions for Sun.

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