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Desktop apps
3D
Free Social Media Icons
internet, feed, mail
MediumSeaGreen
512x512
read, open mail, open
DodgerBlue
App Icons
Email
Gainsboro
128x128
Flat for Linux
Email, mail, envelope
WhiteSmoke
256x256
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Free Applications Icons
Browser, Address, web
SteelBlue
24x24
postcard, envelope, Letter
Stamp, mail, post
Gold