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Fighting image spamFighting image spamPosted Aug 24, 2006 8:39 UTC (Thu) by dion (subscriber, #2764)In reply to: Fighting image spam by warmcat1 Parent article: Fighting image spam
I agree, greylisting is a very useful technique, combined with a realtime database of currently spamming machines it's almost undefeatable.
The tricky bit is getting the realtime database fast and accurate enough to classify a spamming server before the first greylisting wears out.
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