Exchange Server 2010 introduces ECP (Exchange Control Panel) where we can enable a lot of features to end-users, one of these new cool features is the Delivery Reports and the MSExchange.team blogged about this feature, check this out:
Exchange 2010 provides an easy way to verify whether that very important message was delivered to every recipient with a new feature we call delivery reports.
Delivery Reports contains delivery information about messages you sent, such as:
- Why didn't my message go through?
- Where is my message now?
- Who received my message?
And about messages you received:
- Am I a member of any of the groups addressed in this message?
- Why is this message in a folder and not in my inbox?
Delivery Reports can be accessed by users from Outlook Web Access or by clicking on the "Options" button and then going to "Organize E-mail".
Read more at source: http://msexchangeteam.com/archive/2009/06/08/451562.aspx