PNG MORE
Mixed
Pixel
Twotiny
envelope, mail
Lavender
13x13
PNG ICO ICNS MORE
Network & communications
Smooth
Oxygen
envelope
48x48
UI
Fugue Icons
envelope, Message, Letter
32x32
3D
Nuvola
open, mail, envelope
Crystal Clear
Silk
phone, Email, envelope
16x16
envelope, Email, Add
Attach, Email, envelope
Email, delete, envelope
Email, envelope, Error
respond, envelope, share
envelope, Email, open
Email, Link, envelope
open, Email, image