PNG ICO ICNS MORE
Mixed
Pixel
Gloss set: Basic
Message, Go
LightSlateGray
32x32
Message
Gainsboro
star, Message
PNG MORE
Desktop apps
22 e107-Bubbles
private, e-mail, Pm
SaddleBrown
30x30
Computer & hardware
Sweetie BasePack
warn, Message
Silver
16x16
Message, Info
DarkGray
Info, Message
24x24
UI
Gnome icons
Display, Message
Black
Message, post
48x48
Tango
Message, new, mail
Fugue Icons
envelope, Message, Letter
Lavender
Silk
phone, Email, envelope