How to configure front door with webapp slot?

MAIL SLOT definition: 1 a rectangular hole in the door or in a wall near the entrance of a house or other building… Learn more

slot or opening , h , through which a coin may be thrown into the box door , k , is pivoted in like manner as the image e , as shown by Fig 1

door with mail slot My best idea to prevent this has been to buy a backless wall-mount mailbox with a locking lid and mount it on the inside of the door over the slot, but I can't

door mail slot cover Come along as I show you step by step how to cut out and install a mail slot in a garage door