There are four Send options that you can set before sending a mail message:
In an open mail message, tap .
Tap the option and select the desired setting:
Classification: A classification is a security setting that lets the recipient know if the message is confidential, top secret, and so forth. This information appears at the top of the message. A classification does not provide any encryption or additional security. It is meant to alert the recipient to the relative sensitivity of the message.
Priority: The small icon next to a message in the Mailbox is red when the priority is high, white when the priority is standard, and gray when the priority is low. The title of the message also reflects the priority of the item when opened.
Reply Requested: Informs the recipient that you want a reply when convenient or within a specified number of days.
Return Notification: Notifies you when the message is opened or deleted.
For trademark and copyright information, see Legal Notices.