My email software already features “Return Receipts.” Why do I need Self-DestructingEmail ?
The truth is, “Return Receipts” almost never work. The vast majority of all email software and users in the world do not support Return Receipts, and the few that do have usually disabled these by default. In the rare case that you send mail to someone who can support Return Receipts, they get prompted with a rude and intrusive message asking them to tell you that they read your mail, with the default action suggesting they cancel the notification.