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

Blacklist Statistics Center

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