All outgoing email to external recipients from my Exchange 2003 server is getting blocked by RBL lists. I'm new to administrating Exchange and i checked the Message Tracking Center under System Manager on the Exchange server and it's showing that an email address called inform@mydomain.com is sending tens of messages an hour to all sorts of recipient email addresses.
I don't have an email address called inform@mydomain.com so i'm sure this is the culprit.
How can i stop this and protect my server in the future ?