Mailboxes and mail slots were made mandatory in 1923

Before it was possible to have just about any item conceivable delivered to your door with the click of a button, getting the mail took much more effort. When the United States was founded, people had to travel to pick up their mail at a post office, a trip that, for some, could take a full day. By the early 1900s, mail was being delivered to both urban and rural homes by dutiful postal workers...