One of the 50 computers on my network is sending out spam messages thru our exchange server. This has happened before on the weekend and i was able to find the computer by process of elimination, there were only 2 computers left on over the weekend. Now one of them has started it again, this time during the day (started around noon).
How can i find it?
The only way that i know it is happening is that the admin mailbox starts getting a ton of emails stating that an email could not be delivered. They are sending out using my email address, however my computer was not turned on at the time so i know its not coming from mine.
I will start with the 2 computers that had done it before, i ran a virus scan and spybot on them but didnt find much.
Has anyone had this issue, is there a way to detect which computer is doing this?
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