Read Receipts for all emails Outlook for Windows global setting for outgoing Read Receipts is at File Options Mail ‘Read receipt confirming the recipient viewed the message’ turn ON to enable for all outgoing messages. Outlook for Mac Read Receipt Outlook for Mac it’s also on the Options tab Read and Delivery receipts are in Outlook for Mac.
On the Outlook for Windows ribbon Options tab there’s a ‘Request a Read Receipt’ option.
Here’s how to send one or all emails from Outlook for Windows/Mac with a Read Receipt.