Email is Easy

In the spirit of the recent CSS quiz that we linked to not long ago, here is a quiz about email addresses.
I happen to know at least a little bit about some of the stranger edge cases for email addresses. Mostly just accumulated over 40 odd years of being online.
But what I didn’t know is that there you can have comments in CSS email addresses. Take this quiz, learn something along the way, and see if you can get more than the 17 out of 21 that I got. Although I must admit a few of them were pretty random guesses.