A new option on the action menu is Open Delivery Report. If you've ever sent an important email and then agonized over whether it got to the recipient, this feature will be one of your favorites. You can search for messages you've sent to a specified recipient, messages you've received from a specified recipient, or messages with specific words in the subject line. The delivery report will show you on what date and at what time the message was submitted and when it was successfully delivered.
1. Right-Click the message in your Sent items
2. Click Open Delivery Report.