Whatis defines Self-destructing email as an electronic mail that vanishes or becomes unreadable after a certain length of time or upon the request of the sender. They also help prevent printing, copying, forwarding, and saving of the email sent and auto expire after a predefined interval.
An embarassing email sent years ago might come to haunt you today just when you thought it must have been deleted permanently. Self Destructing emails delete the original message once it has been read by the recipient. While they are not completely fool proof, for example, someone can take a photo of the message with the camera, the record on the Internet does not remain.