Need help troubleshooting spam sent from my server
Posted on 2012-08-19
I've just noticed that over the last few days, my exchange server has recorded a bunch of NDR's in the event log. It looks like my server is being used to spam, and my IP is starting to show up on a few blacklists. I'm not sure what the source of the trouble is, and I could use some assistance in tracking this down.
I haven't seen any suspicious activity for about a day, and I've just now enabled message tracking on my server, so (as far as I know) I can't use the message tracking center for any of these messages.
I've run some web-based tests to confirm that I'm not an open relay.
Any suggestions for locating the source of this?