mail icon set rounded corner newsletter black and white envelope flat line art pictogram email message sign

navigate by keyword : mail icon electronic newsletter black business client envelope flat art pictogram message sign web buttons letter outline symbol concept white round isolated paper postage postcard postal address contact email spam send receive cyberspace correspondence design inbox communication website office computer mailing line corner enfold document download interface mailbox

Four envelope icons in a row represent email or messaging. The first is a black line drawing on a white background, the second is a white envelope with a black background, the third is the reverse of the first, and the fourth is an inverted color scheme of the second. All have rounded corners and simple, minimalist designs.