Ключевые слова: address, airmail, await, background, box, business, color, communicate, communication, computer, concept, container, correspondence, deliver, delivery, design, drop, email, empty, envelope, flag, generic, group, icon, illustration, image, inside, isolated, letter, letterbox, mail, mailbox, mailman, message, metal, news, nobody, office, old, open, package, paper, post, postage, postal, postbox, receive, red, retro, send, service, ship, shipment, sign, snail, snail mail, stamp, symbol, vintage, white,