PNG SVG MORE
Mixed
Pixel
8-Bit
post, inbox, e-mail
Black
512x512
PNG ICO ICNS MORE
UI
Fugue Icons
mail, send
SteelBlue
16x16
receive, send, mail
Computer & hardware
WooCons #1
File, send
WhiteSmoke
32x32
Boolean
send
Developpers
send, mail
Sienna
send, document
LightGray
Gnome icons
mail, receive, send
48x48
PNG MORE
Desktop apps
Splashyfish
send, Badge
RoyalBlue
49x49
Tango
send, receive, mail
Vaga
Comment, talk, Chat
DimGray
DRF
envelope, Forward, Letter
Silk
respond, envelope, share
Lavender