How can I keep cold air from coming through the mail slot of our door?

Gold Magnetic Mail Slot Cover in Maldives at MVR 1412, Rating: 5 magnetic mail slot cover Magnetic Mail Slot Covers include a flexible magnetic sheet material which allows mail to be easily placed through slot openings with little resistance eye of ra slot Add a beautiful touch to your home while discouraging mail theft by installing a classic mail slot Mail slots with a spring-loaded cover prevent drafts,

dead man’s fingers slot Slimline Mail Slot Catcher, Post Letter Box Cage Ideal for UPVC, Glass, Wood and Metal Doors Strong Adhesive Letters, Small Packages, Magazines No Screws or