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As you can see from these examples, the AWL operates by averaging out the "score spikes" between different emails. By the very nature of averages, this means that it will push the high points down, and the low points up, but it will always push them towards the average for that sender. As long as the average for that sender is on the right side of the spam/nonspam fence, it will do it's its job nicely.

(by MattKettler)