ZEN (zen.spamhaus.org)
- best RBL
- about 70% spam coverage, 0.0% false positives
SPAMCOP (bl.spamcop.net)
- very accurate, usually blocking more than 50% of spam. It works well in conjunction with Spamhaus ZEN, adding another 3-4% of spam blocking on top of ZEN’s existing effectiveness;
- about 60% spam hit, 0.0% false positives
UCEPROTECT All Lists (dnsbl-1.uceprotect.net, dnsbl-2.uceprotect.net, dnsbl-3.uceprotect.net)
- nearly 80% spam coverage, but 0.0-0.5% (once 1.8) false positives
RATSNOPTR (noptr.spamrats.com)
- probably IPs with no PTR record
- about 12.7% spam hit, 0.0% false positives
RATSDYNA (dyna.spamrats.com)
- about 20.5% spam hit, 0.0% false positives
BHNC (bhnc.njabl.org)
- NJABL.ORG is Not Just Another Bogus List
- about 3.5% spam hit, 0.0% false positives
KOREAS (korea.services.net)
- about 3.1% spam hit, 0.0% false positives
Resources
- http://stats.dnsbl.com/
- Check if you are listed – http://www.verynicetools.com/go
- http://www.spamtips.org – This blog aims to provide the latest in tips, tricks and pre-packaged anti-spam stack binaries to support those who maintain SpamAssassin on Linux servers. Rule and score recommendations are based on actual statistics through daily and weekly masscheck measurements.
Blacklist Statistics Center