"Does it have an @? Does it have a period? Great! You are validated!" Technically a period is not required, you can have an email address directly on a top-lev

"Does it have an @? Does it have a period? Great! You are validated!" Technically a period is not required, you can have an email address directly on a top-level domain. Though, of course, that is a rare enough use case that I'm sure anyone who has one has long since given up on expecting it to be validated correctly by most webforms.