dumb USPS mail question- outgoing mail door slot?

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Currently, the best letter slot for doors is the Gibraltar Mailboxes MS00RC03 Wiki researchers have been writing reviews of the latest door

door with round slot re4 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

door letter slot Letter box · A slot in a wall or door through which mail is delivered · A box attached directly to the building