...
When you receive a confidential email message, you'll see a message about that message's permission level. For example, someone receiving a message with the West Virginia University - Confidential permission level would see:
West Virginia University - Confidential - This content is proprietary information intended for internal users only. This content can be modified but cannot be copied and printed.
Permission granted by: OriginalSender@mail.wvu.edu
If you click over open this message, you’ll see a View Permission prompt. Clicking on it will show permissions in greater detail and the actual message will display in the body of the email.
...