How does read receipt of Boomerang work?

On receiving a read receipt, the sender’s email system updates the original message showing the date and time the recipient read the message. A read receipt is a specially formatted message acknowledging that a recipient read the message. If you request a receipt and don’t receive one, that doesn’t mean the recipient didn’t read the message. read more

No, there is no script. It’s pure old HTML. They fool the browser by using an image tag which makes a request to their server whenever the email is opened. The server registers the request for the image as an “Email Opened” event. read more

A read receipt is a way for the sender of an email to request notification when a message has been read. Boomerang's read receipt feature offers valuable open and click tracking data while at the same time respecting the privacy of the recipient. read more