Message outlined flat icons - Stock vector

mail, letter, message, information, exchange, send, receive, post, paper, envelope, delivery, stamp, icon, icons, set, flat, button, buttons, application, round, circle, frames, outlines, strokes, design, template, ui, user-interface, element, vector, illustration, sign, symbol, plain, simple, white, green, red, yellow, blue, brown, magenta, mustard, gray