> However, we had a subscriber pop in from HOTMAIL (and cause some big time
> problems) and I did not receive any notification when they joined the list.

Just to add one more to the list of possibilities people have already
suggested:  I think that - depending on your Validate settings - it's
possible that they forged your address and did a QUIET ADD on
themselves.
Yet another reason it might be a good idea to check the logs.

Margaret King ([log in to unmask])
Michigan State University