Your business and private correspondence depends heavily on whether your messages are being duly delivered to their intended recipients. On many occasions you wouldn't be able to reach your recipients because the IP address of your mail server is blacklisted. Often times you will receive bounce-backs to inform you that your messages didn't reach their recipients. Depending on the policy of the recipient's ISP, your messages may even be dropped silently because your IP address is found on a blacklist. Then you will never know if you've actually been able to make contact.

More than 30% of email marketing messages are not delivered to their recipients either. Many of them get rejected because the IP address of your mail server is on a blacklist. For example, AOL blocks more than 80% of the messages it receives to its members. In many cases the reason for it is that your IP belongs to a network range that has spammed or your IP address itself has somehow been involved in spam operations.

Sometimes you may be blocked because your mail server acts as an open-relay proxy or because its IP address lacks a PTR record.

You need to know where you are blocked and how to remedy the situation. The RBLmon will tell you where you are blacklisted and how to begin the blacklist removal process.