GMail is much better than Hotmail or Yahoo! at filtering spam email but the system is still far from perfect. As GMail users, we do encounter situations when a legitimate e-mail message from a friend or a client is incorrectly tagged as spam by GMail (known as false positive). Infact, a NYTimes story suggested that the false-positive filtering rate of GMail is around 3% which means that every 3 emails (out of 100) tagged as spam by Google Mail may be from your friends, family or other contacts.

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