Ключевые слова: address, background, bill, box, building, bulk, business, communication, communications, concept, condominium, copy space, correspondence, crowded, delivering, delivery, domestic, entrance, envelope, filled, full, home, house, indoor, interior, key, letter, letterbox, locker, mail, mailbox, mailboxes, message, metal, modern, newspaper, nobody, number, office, paper, post, postage, postal, postbox, residential, row, security, send, spam, wall,