Mail Slot Aluminum

How to cover this mail slot up so cold air won't come in? door mail slot blocker Annmore Shop Mail Slot Catcher for Door Mail Slot, Black Indoor Mail Slot Cover Interior Draft Stopper, Large Size, Self-Adhesived, Large Capacity, doornmaat slot 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 letter slot How about a through the door mail slot that does not give you cold drafts? It even has brushes to block the cold air if someone left a letter