PNG ICO ICNS MORE
Leopard
Email, Message, mail
CornflowerBlue
256x256
Oxygen-Refit
Email, Letter, Folder
128x128
PNG MORE
Files & folders
Pixel
ExplodingBoy Pixel Icons
mail
20x20
Mobile apps
Smooth
iCandies
button, 39, mail
64x64
Business & finance
Project icons
Stamp, mail
32x32
Dusk
59x60
Desktop apps
Absque
mail, Stamp
iSuite Revoked
512x512