Exchange 2003 and Authenticated User Relay Spam

Posted by & filed under Exchange Server.

Exchange 2003 is a good target for spammers since it is very widely used (still) and has a history of installations with less than ideal security. In addition to the typical email-turned-spam server scenarios (open relay, security holes, NDRs), authenticated relays are next on the list. This happens when the security credentials of a user… Read more »