The silent network: denying the spam and malware chatter using free tools: BSDCan, Ottawa, May 18th 2007 | ||
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Summing up:
High precision
Good effect, minimal load
Never better than poorest data source used
We ended up using Bob Beck's list at http://www.openbsd.org/spamd/traplist.gz
Prime example: Steve Williams' October 20th, 2006 message to the OpenBSD-misc mailing list - got rid of more than 95% of spam using pure greylisting