1618
And it'll be the most subtle, unassuming envelope too.
(lemmy.world)
People tweeting stuff. We allow tweets from anyone.
RULES:
Label you put in the corner of your outgoing mail that has your name and address preprinted on it so you don't have to write it.
Given that I write like... 2 letters a year, it's really not a significant burden. Anything of consequence is online, and if I'm mailing Christmas cards or something, I'll want a festive return label anyway.