I have checked my exchange 2003 server and it is set to allow non-delivery reports. I'm getting the reports in my account, but have had complaints that our clients are not aware that their e-mail had been undeliverable. The messages I'm getting show ( in the message options) that the recipient was addressed to receive the NDR. The other issue is the delivery time of the NDR. How long should ti take for an NDR to be generated once a message has been refused. Most of our NDR's are generated from the message having too large an attachment.
The other question I have is , is there any way for the original recipient to know that a message that was addressed to them was not delivered to them, other than me passing on the postmaster e-mails? We are just trying to avoid having clients send mail that they thought we received, but did not. No one knows so no one respond or acts on the e-mail.