If you don’t get one, you won’t have a clue if the email was ever delivered to the recipient’s inbox. The same applies for delivery notifications.

If you don’t receive a read receipt, you’ll have no way of knowing if they saw your email and if they’re working on the project. Let’s say you send an email to a client with instructions for a project. Knowing whether or not your email was received is vital in business. Read receipts notify you when an email is opened, whereas delivery alerts notify you when an email is delivered to the recipient’s server. That’s where read receipts and delivery notifications come in. If an email is essential, you must know whether it was received and opened. What is the usefulness of reading receipts and delivery notifications? There is no way to force a recipient to send a read receipt. Other situations, such as when the recipient’s email application does not allow read receipts, can also result in reading receipts not being sent. In Outlook, the message recipient can decline to provide read receipts.

A “read receipt” ensures that opened your message.

A delivery receipt confirms delivery of your email message to the recipient’s mailbox but not that the recipient has seen or acknowledged it.

Outlook read receipt notification