I recently took the this mail template and converted it to a Single Copy Template. I then applied it to a group of 96 users. Around 5 -10 of them had their Return Receipt turned on for all out going messages. I looked in the Domino log and did not see any errors or anything special on the users that reported this. Is there a Notes client setting that could be causing this? I just would like to know why this would happen and why it would not happen on all users?