I'm using Exchange 2003, and have been having a problem for a while now. My mail cue fills up trying to send out junk from inside our system. It usually uses bogus or old email addresses. I go to the line and freeze & delete as many as I can, but I cant seem to find the computer on our network with the virus.
I'm using Trend Micro 8.9, I've scanned, and cleaned up all the problems that I've found, but I continue to get these emails filling up my system.
I've looked at several answers on here, but I'm only running a single exchange server, so some answers dont apply.
Any suggestions? Tools to find where this might be coming from? Big hammer to beat the crap out of the server?