dumb USPS mail question- outgoing mail door slot?

letter through mail slot A mail slot in a red door Front residence entrance with a classic design The door has a large brass knocker and mail slot

Lock the parcel compartment and drop the parcel key in the outgoing mail slot of the community mailbox Where are larger parcels delivered? We'll deliver

door mail slot blocker Shop the best deals on PUGUO Solid 304 Stainless Steel Door Mail Slot at Ubuy India Get the perfect Victorian Letter Box Plate for your front doors

doornmaat slot Sink the acorn nuts below the surface of the wood, then mount the included replica backplate over the slot on the inside of the door for a nice finished