Sometimes, when a user sends an email, this email is being received twice by the recipient.The message id is the same, the date is the same but the date of the header is different, so it looks like the exchange server is cloning the email and sending it 2 hours later.I checked the Sent folder of the user and there's only 1 email sent, i also checked the Message Tracking Tool, and it looks like the email is received or processed twice. Both times with this message at the beginningSmtp Store Driver: Message Submitted from Storeany ideas ?

Christian - were you able to determine the cause of this issue? I have some users experiencing the same problem.Thanks.

Christian - please let me know as well. I have a staff member who is also having the same problem Cheers Brett