Mailbox may refer to: Letter box (also known as a letter plate, letter hole, deed or mail slot), a private receptacle for incoming mail Post box (also known as a drop box), a public receptacle for outgoing mail Pillar box, a freestanding post box in the United Kingdom and the Commonwealth Email box, a destination for electronic messages Mailbox (application), email management software for mobile devices Mailbox Birmingham, a retail complex in Birmingham, England The Mailbox (film), a short movie by the Church of Jesus Christ of Latter-day Saints Message queue, a means of interprocess communication in software engineering Pigeon-hole messagebox, also known as a cubbyhole, pigeon-hole or pidge a square-centric method of addressing a game board in game playing computer automatons - see Board representation (computer chess) See also Mailbox baseball Mail (disambiguation) Box (disambiguation)