Ключевые слова: antique, background, black, box, cartoon, classic, color, correspondence, english, envelope, flat design, global, icon, illustration, isolated, letter, letter box, letterbox, london, mail, mailbox, mailbox icon, mailing, modern, old, post, postage, postal, postbox, public, retro, royal, service, stamp, symbol, traditional, uk, vector, vertical, vintage, wall, white,