PNG ICO ICNS MORE
Network & communications
Smooth
Oxygen
replylist, mail
Lavender
48x48
UI
Pixel
Fugue Icons
mail, playlist, open
16x16
document, music, open
open, document, Text
open, document, mail
mail
table, mail, open
envelope, Message, Letter
32x32
PNG MORE
Desktop apps
KDE Crystal Diamond
24x24
3D
Nuvola
Folder, mail
128x128
open, mail, envelope
to, post, mail
mail, new
Crystal Clear
mail, delete
envelope, mail
Get, mail
to, mail, post
mail, reply all
Silk
phone, Email, envelope