I have a user that has Office 2K on Exchange 5.5. When he sends an email, it asks for a receipt. This seems to be working for everyone except one user. This user has a rule written that automatically sends a copy of all emails from this specific sender to a subfolder in his Inbox. When he turns the rule off, his receipt is processed. Here is the kicker. This problem just started last week, and no changes were made to Exchange, or either of the users profiles. The recipient has been using the rule without a problem for almost a year. If anyone has heard of this or anything similar, please let me hear from you.