Craig Hughes, who originally worked with the Spam Assassin team, and then went on to found GumStix, has discovered something interesting: much more spam is received during the nighttime hours than during the day. It’s a dramatic enough difference that Hughes says that he is convinced that ‘time of day received’ is a useful test to help determine whether something is spam.

SpamAssassin has handily won as the best anti-spam product in Datamation’s Product of the Year Awards, receiving nearly twice as many votes as the next closest contender.