Delivery and Read Receipts in Outlook for Mac
For email accounts and services that support it, Outlook 2016 for Mac now lets users request delivery and read receipts for sent emails. The difference is that a delivery receipt confirms only that the email successfully made it to the recipients account, while the read receipt confirms that the email was actually opened by the recipient. Again, not all email accounts and services support these features, and in many cases the recipient can choose not to respond to a receipt request. To request a receipt do the following:
1. Create a new email.
2. Go to Options tab.
3. Select Request Receipts button.
4. Select Request a Delivery Receipt or Request a Read Receipt options.
Note: Delivery and read receipts are available to all Office 365 subscribers today running version 15.35, build 170610 and up.