We have an Exchange 5.5 SP3 server at our site for approximately 700
users. One or two of the users constantly get messages that keep
repeating coming in from the Internet. They don't have any rules set.
Nothing appears to be* in the queues. After about 5 days the
message stops repeating. The sender of the mail receives a message
saying that the message is never delivered. I think that is the crux of
the problem, Exchange is not acknowledging receipt of the message. Can