PNG ICO ICNS MORE
UI
Pixel
Fugue Icons
mail, send
SteelBlue
16x16
receive, send, mail
Boolean
send
WhiteSmoke
Developpers
send, mail
Sienna
32x32
send, document
LightGray
Gnome icons
mail, receive, send
Black
48x48
Tango
send, receive, mail
Vaga
Comment, talk, Chat
DimGray
Silk
respond, envelope, share
Lavender