Ideas for sealing up a drafty through-wall mail slot

Mail flap is spring loaded on the exterior and swing loosely on the interior Door Viewer · Urn Door Knocker · 7 Modern House Numbers { id: 380899

The No-Draft Mail Slot has two door flaps, both spring loaded and weather-stripped, as well as an internal brush strip for greater insulation and privacy

mailbox slot cover Mail Slot 13-18 with Interior Frame Deltana Mail slots are easily installed directly into front doors allowing the mail to find its way home

mailbox door slot More secure options now exist that can protect your home and mail better DuraBox is one brand that's great It is installed on the inside of your door so it