USPS wants people to install new jumbo mailboxes Here's why

Accommodate large mailed items such as books, but keep them secure An extra-large twelve-inch mail slot allows delivery of bigger items than a regular locking

However there is a slot for mail on the back that is accessible even when the boxes are locked According to Postal Inspector Patricia

usps mail slot requirements A slot or opening where customers deposit mail Package Drop Units A new form of collection receptacle that the Postal Service™ has

slot big easy gratis Mailboxes must be placed 6 to 8 inches away from the curb; the incoming mail slot or door must be 41 to 45 inches from the ground Curbside