Need additional confirmation that your email has been delivered? Use the Delivery Receipt checkbox. When this feature is enabled, the email sender will receive an additional email from the system postmaster that the message has been delivered to the recipient.
To receive a delivery receipt:
Here's how to access the Delivery Receipt Request from the Compose Options Menu:
From within the Compose page, tap the Compose Options menu at the top right corner of the Navigation Bar.
1. Choose Request Delivery Receipt from the action sheet.
2. A pop-up message will appear letting you know that you will receive an email Delivery Receipt notification if the recipient's email provider supports this feature. Tap OK.
Note: You can choose to disable this pop-up by tapping the checkbox.
Note: You will receive an email notification that your message has been delivered.