Which RBL do you use?

List of reliable RBL that we use internally and recommend to our customers.

Here goes:

  • zen.spamhaus.org
  • bl.spamcop.net
  • combined.njabl.org
  • cbl.abuseat.org
  • combined.rbl.msrbl.net
  • psbl.surriel.com
  • b.barracudacentral.org

With these RBL, combined with greylisting and a good SpamAssassin ruleset, out of combined 50,000 - 55,000 incoming email attempts daily on all SMTP servers that we monitor, only 0.05% of spam managed pass through. Pretty good!