Easy energy saving solution for old fashioned mail slots

Ideas for sealing up a drafty through-wall mail slot mail slot through wall US mail carriers will take mail that is anchored into the slot with the cover, just like you'd anchor mail under the lid of a regular mailbox mail slot for front door Residential mail slots fit snugly into a horizontal slot in your door or outside wall This snug fit provides a weather-resistant flap over the slot that

mail slot privacy hood SKYSHALO Through The Wall Mail Slot Off Box - Secure Mail Vault for Mail, Rent, Checks, and Cash