You can request a read receipt for a message you are sending from the recipient. A
read receipt confirms that your message was opened.
Please note that the recipient can decline to send read receipts. There are other
scenarios in which read receipts are not sent, such as when the recipient's email
program doesn’t support read receipts. There is no way to force a recipient to send
a read receipt.
Compose your e-mail.
In the To and Cc fields, add or
On the Options menu, select the Read Receipt check box.