If you don't realize you did it in a few seconds you're still shit out of luck, though. I imagine most people won't realize they sent it to the wrong person unt

If you don't realize you did it in a few seconds you're still shit out of luck, though. I imagine most people won't realize they sent it to the wrong person until they're notified of the other party not receiving it, or there's an unusual length of reply time. I wonder how people would feel about emails being undoable until the other party opens it.