PNG ICO ICNS MORE
Computer & hardware
3D
Discovery
junk, mail, mark
Gainsboro
32x32
junk, Not, mail
new, envelope, Compose
mail, All, reply
WhiteSmoke
receive, mail, send
Black
mail, Compose, envelope
Letter, open, mail
open, Letter, mail
Attachment, mail
Social media
Photorealistic
Crumpled
square, mail
128x128
mail
Photography & graphic design
Smooth
Transformers
mail, E
PNG MORE
Avatars & smileys
Pixel
Mazes
mail, Email, envelope
19x19
PNG ICO MORE
Desktop apps
Ginux
64x64
Business & finance
Pretty Office
Addressbook, contacts, mail
DarkKhaki
256x256
Free Applications Icons
Browser, Address, web
SteelBlue
24x24
postcard, envelope, Letter
DodgerBlue
Stamp, mail, post
Gold
Cartoon
Mobile Phone
envelope, mail, Email
Music & multimedia
Soft Icons
AliceBlue
UI
Quartz
newsletter, envelope, Email
Human o2
Orange, Folder, mail
DarkGoldenrod
Forward, mail
unread, mail