Sealing a mail slot in a door

Mail Slots and Mail Slot Cover for Doors Add a beautiful touch to your home while discouraging mail theft by installing a classic mail slot Mail slots with a

Mission Style Mail Slot for Front Doors Several Finishes Available Authentic Craftsmanship Perfect for Traditional or Victorian Homes

front door mailbox slot Installation instructions for an Elite Model DraftDodger™ Insulated Mail Slot when the existing

front door mail slot Mail slots all seem to be abot 3 wide Is there some sort larger opening door or drop box type thing that could be installed on the front door