I have a small business server 2000 that has started to relay mail for some random spammer and it is going out at an alarming rate! I have checked all the relay restrictions and it appears that I have all the settings correct and I have tried to relay using telnet and I am unable to. I have virus scanned the server and found nothing and have even move4d the server to new hardware and completely changed everyones password but this is still happening and I dont want to get blacklisted so what can I do??
I have enabled diagnostic logging on smtp protocols to check if anyone if authenticating but nothing appears in the event log.