We know that mailing envelops are actually used in the mail but they’ve been around for quite some time.
We also know that envelopes are usually made of paper.
But it’s not the first time we’ve seen people use mailboxes to store things, and now a new article on the internet claims it’s the first thing people will do.
It’s a good thing they do because if it was up to us, we’d probably send you a copy of the letter you sent.
This post has been updated with more information and an image of the envelope.