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Live accuracy figures for most of the DNSBLs used in SpamAssassin, based on the Oct 2003 mail feed for one user, can be found here.
Weekly statistics of accuracy and failure rates for specific blacklists can be found here.
Other Lists
Other places to find out about DNS blacklists / blocklists:
- Spamlinks http://spamlinks.net/filter-dnsbl.htm
- Dr. Jørgen Mash's DNS database list checker http://moensted.dk/spam/
- List of All Known DNS-based Spam Databases (blacklists) http://www.declude.com/junkmail/support/ip4r.htm
- Current Blacklist Comparison (note: no statistics for false positive rates) http://www.sdsc.edu/~jeff/spam/cbc.html
- Wikipedia on DNSBLs http://wikipedia.org/wiki/DNSBL
- Weekly Blacklist Statistics (including hit rate and false positive rate) http://www.intra2net.com/en/support/antispam/
Note that it's extremely important to compare false positive rates (nonspam messages marked as spam), as well as spam hit-rates, when evaluating any anti-spam system, include DNS blocklists. (For example, a blocklist that returned a match for every single mail would 'catch all the spam', but would also mark every nonspam mail too.) Some of the above pages omit this information, so take with a pinch of salt.
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