Realtime blacklist monitoring

Realtime Blacklist (RBLs), also called Realtime blacklists; are email  blacklists primarily there to report any IP addresses and domains that  are linked to spam. 

To lookup your domain or IP address for blacklist monitoring, you can  either go to individual blacklisting providers, or you can use  comprehensive blacklist checking tools that checks multiple rbls for  you:

  • Reputable blacklisting providers:
  1. Barracuda Reputation Block List Lookup (BRBL)
  2. Invaluement Lookup
  3. SpamCop Lookup
  4. Spamhaus Lookup (One of the most reputable blacklists - ISPs are more likely to block more than 80% of your mail if you are listed at Spamhaus)
  • Comprehensive blacklist checking tools:
  1. MXToolBox Lookup (This also  provides with insight into DNS checks, where you will be able to tell  you if your domain or IP is possibly being tarnished)
  2. MultiRBL Lookup