Ключевые слова: address, app, attachment, business, collection, color, communication, concept, contact, create, delete, design, document, email, envelope, filled, graphic, icon, illustration, inbox, information, interface, internet, isolated, letter, line, mail, mailbox, message, new, newsletter, notification, open, outline, paper, pictogram, post, postal, receive, send, set, sign, sms, spam, symbol, web, website,