Ключевые слова: aged, america, american, ancient, blue, box, communication, country, drop, envelope, freight, isolated, letter, letterbox, mail, mail icon, mailbox, mailing, message, metal, parcel, post, post office, postage, postal, postal mail, postal service, postbox, postcards, public, red, retro, send, service, ship, shipping, symbol, united states, usa, used, west, white,