Do you have a mail slot on your front door?

Yelsky Mail Slot Catcher, PU Leather, Alternative to Letterbox Cage, Mail Slot Catcher for Small Parcels and Letters, Easy to Install, Transparent Front,

Permanent insulation will fill the slot and make it unusable, but will do a great job of insulating your door Or you can install a new highly insulated mail

door slot block at front is for scroll ; holes will aid in carving flutes Top mail from an extruded brass mail slot to a box located in a closet This

door slot mailbox If you do want to do it, the easiest way is to just put some shrink wrap over it Get some double-sided tape, make a square around the mail slot