PNG ICO ICNS MORE
Desktop apps
3D
Free Social Media Icons
read, open mail, open
DodgerBlue
512x512
Flat for Linux
Email, mail, envelope
WhiteSmoke
256x256
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Free Applications Icons
postcard, envelope, Letter
24x24
Stamp, mail, post
Gold
Minicons
mail, envelope, windows live mail
Lavender
48x48