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Spam blocking with greylistingSpam blocking with greylistingPosted Jun 27, 2003 15:07 UTC (Fri) by copsewood (subscriber, #199)Parent article: Spam blocking with greylisting I don't know how well this approach will work, at the moment it's at the same status Bayesian filtering had a couple of years ago. This is a very, very fast moving target, so research of this kind is very welcome. As I didn't have control over the MTA receiving mail for my domain which I subsequently pick up using POP3, I developed a program which tags spams using the DNS blacklists at a later stage. I found my tagspam program on its own can catch about 80%. So I combined this approach with SpamAssassin as 80% wasn't good enough. However, the ones that get through tagspam mostly get caught by SpamAssassin, which on its own also gets about 80%. Fortunately the combination of tagspam and SpamAssassin seems currently to be getting about 98% (49 out of 50) which I consider to be fairly good.
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