PNG ICO ICNS MORE
Mixed
Pixel
PixeloPhilia 2
envelope
BurlyWood
32x32
UI
Cologne
Email, envelope
LightSkyBlue
PNG ICO MORE
3D
Gnome Web Icons
mail, envelope, open
LightGray
64x64
unread mail, envelope, mail
Black
PNG MORE
Smooth
Some icons
envelope, Email
WhiteSmoke
80x80
Computer & hardware
Photorealistic
Mobile Icons
messages, Email, envelope
LightCyan
128x128
32px Mantra
mail, Email, envelope
Gainsboro
Cartoon
Oxe Set
envelope, mail, Email
Business & finance
Pretty Office part 2
read, envelope, Already
Gold
256x256
Simplicio
Goldenrod
Bloggers Vol 1-7
envelope, Add
DarkGray
512x512
Email, envelope, Forward
Desktop apps
Handdrawn
Marker-Style Icons
Arzo
Lavender
48x48
Snowish
Network & communications
Wifun
xmas, card, christmas
Flat for Linux
Email, mail, envelope
Primo
mail, newsletter, Compose
Email, newsletter, envelope
Email, send, mail
Sizicons
GhostWhite
16x16
Glyph
Wireframe mono icons
mail, envelope
DarkSlateGray
Shopping & e-commerce
Plastic
Matte set: Basic
envelope, Message, mail