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Hey has anyone seen blank originators in Exchange 5.5 under the Internet Mail Connector? I've been seeing it allot lately when I look at the outbound que and i'm trying to figure out what's going on. I'm not sure if it's a relay happening from the outside of if a user internally has some spamming program on there system. It shows the destination but the originator is <>.
Any input would be appreciated..
What do you see in the tracking log? A lot of time system messages will appear to have a null sender. System messages would be read/delivery notifications, and NDRs.
Unfortunatley message tracking is not turned on. Any other ideas?
Without message tracking you are not going to be able to tell definitively what the messages are. With message tracking it would take about 5 minutes to tell if what you are seeing are system messages an legitimate, or if they are something that is not legitimate on your network.