Ключевые слова: address, background, box, boxes, business, color, communication, computer, concept, container, correspondence, delivery, design, email, empty, envelope, flying, full, icon, illustration, inside, letter, letterbox, letters, lot, mail, mailbox, mailing, mailman, message, metal, news, nobody, office, open, package, paper, post, postage, postal, render, send, service, sign, white,