I just deployed a new exchange 2007 server and it sends and recieves mail fine. I joined about 10 pre-existing workstations to the domain and setup oulook to work with exchange mailboxes. When I look at my que it looks as though my server is sending SPAM. My guess is that one of the client machines has an infection that is sending mail through exchange. Does anyone have experience troubleshooting this? What is the process for ending these issues?