ELI5: Explain Like I'm 5

Hybrid mail

Hybrid mail is a way of sending mail that is both fast and secure. It uses a combination of traditional mail delivery (like sending through the postal service) and electronic mail delivery (like sending an email). With hybrid mail, you can send messages to people who have both kinds of mail delivery. You can send something through the postal service and then an email will be sent to let them know that it has arrived. This way, you can be sure that your message will get to its destination faster without having to worry about it getting lost or stolen along the way.