Manage RBL
Configure RBL Servers on Exim
This option will help you to configure RBL servers for exim.
Exim Mail Server -> Manage RBL
The real time black hole list, RBL, is a service for operation for mail servers to perform a check via a Domain Name System query whether a sending IP address is blacklisted for email spam.
Add New RBL Server
To add a new RBL domain enter the domain name and Description and click Add RBL. This will add new RBL to your exim servers.
Eenos manage 4 RBL servers by default , bl.spamcop.net, zen.spamhaus.org, b.barracudacentral.org, psbl.surriel.com