Sealing a mail slot in a door

MAIL SLOT INSTALLATION mailbox door slot Letterboxes or mailboxes use the following primary designs: A slot in a wall or door through which mail is delivered ; A box attached mailbox slot You may have ordered a Mail Slot with a gravity flap on the interior side of your door, or with a frame only Installation is basically the same for either

mailbox for door slot A mail slot is not a mailbox So putting a key through a mail slot after locking the door is not the same as putting the key in a mailbox