I have a user that sent an e-mail from our Exchange 5.5 (using Outlook 97) mail system to an outside vendor. The vendor reports that they got the same message over 30 times and insists the problem is on our end. I tracked the message and it appears that it only went out only once. How do I found out if it really is on my end? Any suggestions on where to look or any help whatsoever would be appreciated.