To request a read receipt or a delivery receipt for your message:
-
Select
at the top of the message compose pane. -
Select Show message options.
-
Select Request a read receipt or Request a delivery receipt, or both.
To choose how Outlook on the web responds to read receipt requests:
-
Select Settings
> View all Outlook settings. -
Select Mail > Message handling.
-
Under Read receipts, choose how to respond to requests for read receipts.