PNG ICO ICNS MORE
Photography & graphic design
3D
Dark Glass
mail, send
LightGray
128x128
UI
Glaze
send, mail, green
DimGray
64x64
Pixel
Vaga
Comment, talk, Chat
16x16
Smooth
Function icons
mail, Letter, receive
DarkGray
48x48
Mixed
DRF
envelope, Forward, Letter
Black
32x32
Business & finance
SEM Labs
send, Message, mail
mail, Forward, send
Carpelinx
mail, send, Forward
send, Letter, mail
Desktop apps
KDE Crystal Diamond
send, mail
22x22
Isoglass
push, def, send
Nuvola
DarkSlateBlue
Crystal Clear
Gainsboro
PNG MORE
Khaki
send, Backward
Gold
20x20
Silk
respond, envelope, share
Lavender