We have an Exchange 2010 environment, and since the upgrade from Exchange 2003, whenever we send a message with a request for a delivery receipt (using Outlook 2010), we get the following error message (from our own Exchange server's postmaster account):
Delivery to these recipients or groups is complete, but no delivery notification was sent by the destination server
This is not related to settings on the destination server, since when I send messages not via my exchange, I don't get the error (I either get a delivery notification, or no notification at all, but no error message).
What could be causing this?
Thanks,
David
