PNG ICO ICNS MORE
Computer & hardware
Pixel
Icon set 32 px
envelope, mail
WhiteSmoke
32x32
UI
Fugue Icons
envelope, share
DarkGoldenrod
16x16
WooCons #1
envelope, open, Email
Email, mail, envelope
Mobile apps
iPhone Sidebar icons
envelope
Peru
Mixed
PixeloPhilia 2
BurlyWood
Cologne
Email, envelope
LightSkyBlue
32px Mantra
mail, Email, envelope
Gainsboro
Desktop apps
Sizicons
GhostWhite
envelope, exclamation
Arrow, envelope
Minus, envelope
Khaki
envelope, pencil
envelope, plus
envelope, Label
PNG MORE
Avatars & smileys
Mazes
19x19
BWPX
Silver
18x18
envelope, open
Gray
manilla, Bag, paper
C9d
DarkGray
24x24
envelope, Email, Letter
Lavender
Led Icons
SandyBrown