RBL Checking

The Mail Abuse Protection System’s Real-time Blackhole List (MAPS RBL) is a list of host and networks that are known to be friendly or neutral to abusers who use these hosts and networks to either originate or relay spam, or to provide spam support services.

You can configure your MTAs to compare incoming connections against the MAPS RBL. You can also use DNS-based databases used to determine incoming SMTP connections that might send unsolicited bulk mail.

For more information, see Chapter 18, Mail Filtering and Access Control, in Sun Java System Messaging Server 6.3 Administration Guide.