I think this pun is past its prime... I mean, go to your mailbox and tell me how many letters are in it right now. I don't think you're gonna upset anyone at the spelling bee with that amount. 😅
I knew someone would bring this up eventually. It's actually not required (as seen in certain memes with the "Y U NO" rage face, like this one: imgflip.com/i/34nl4f)!