Easy energy saving solution for old fashioned mail slots

Mail Slots and Letter Boxes - Mailboxes mail drop slot adjustable-through-the-wall-mail-drop-slot This Mail mail slot cabinet slots, not boxes There are post boxes all over town, so I walk over and drop my outgoing mail in the one closest to home Upvote 7 Downvote

mail slot cover interior A letter box, letterbox, letter plate, letter hole, mail slot or mailbox is a receptacle for receiving incoming mail at a private residence or business