Trend Micro RBL+ Service is a commercial service. If you would like to use it on your server, contact Trend Micro, Inc. sales department or one of its resellers, and subscribe for the service.
To find more about Trend Micro RBL+ Service, visit http://www.trendmicro.com/en/products/nrs/rbl/evaluate/overview.htm
Once you have subscribed to the service and received the service activation code, you need to configure your mail server to use it:
Now, e-mail messages from known spammers should be rejected with an error code 550 (connection refused).