PNG ICO ICNS MORE
UI
Smooth
Ultimate Gnome
send, Move, right
Black
256x256
Pixel
Gnome icons
mail, receive, send
48x48
send, mail
Tango
send, receive, mail
32x32
3D
Glaze
send, mail, green
DimGray
64x64
Vaga
Comment, talk, Chat
16x16
Function icons
mail, Letter, receive
DarkGray
Nuvola
DarkSlateBlue
Crystal Clear
mail, send
Gainsboro
PNG MORE
Khaki
22x22
send, Backward
Gold
20x20
Silk
respond, envelope, share
Lavender