I received the following question from one of my About.com readers. I am not an Exchange guru per se and thought that maybe some of my AO compatriots might be able to provide the answer.

Basically he is having a problem with an Exchange Server mail delivery queue. There are messages in the queue, allegedly spam messages, which this person can not get rid of. He has tried to delete them but it seems to have no effect. He says there are about 100 messages currently stuck in the queue in this manner and that he has done scans of the client computers to try to determine the source of the offending messages to no avail.

Does anyone have any suggestions for how to forcefully delete these messages and / or how to track them to their source to fix the problem for good?