A new demo has been added in the Exchange Server 2003 demo portion.The detail of this demo is
Title: How to Send Delivery Reports to Message Originator in Microsoft Exchange Server 2003
Objective: The objective of this demo/tutorial is to teach you how to send delivery reports to message originator in Microsoft Exchange Server 2003. When a message sent to a group is not delivered, you can specify that delivery reports be sent to the message originator. The delivery report lets the message originator know that the message was not delivered.
If you are a subscriber, then click the Demos link in the navigation menu to view the complete list of demos.