PNG ICO ICNS SVG MORE
Social media
Glyph
Socialicons
mail, Message, Email
LightSlateGray
512x512
PNG ICO ICNS MORE
Photography & graphic design
Flat
Flatified
fold, Email, Communication
Tomato
Mixed
Ballicons 2 Free
Message, Communication, Contact
DarkSlateGray
Orange Social Icons
Letter, twitter
DarkOrange
484x484
Network & communications
Communication & Technology
invite, Letter, share
Black
envelope, send, invite
UI
Outline
Office icon set
envelope, Communication, mail
Files & folders
small-n-flat
Enveloppe, Letter
Gold
Integral
Letter, mail, Message
PNG ICO MORE
Handdrawn
Jolly Icons Free – 36 Hand-Drawn UI Icons
inbox, letterhead, hand drawn
64x64
Education & science
Brainy Icons Free — 36 Science and Education Icons
submit, creative, Letter
Desktop apps
3D
Free Social Media Icons
internet, feed, mail
MediumSeaGreen
read, open mail, open
DodgerBlue
Christmas
Photorealistic
Standard New Year Icons
Letter, santa, Message
PaleGoldenrod
256x256
Message, year, Email
Wheat
32x32 Free Design Icons
Email, Message, @
32x32
Text, type, Font
PNG MORE
Business & finance
Pixel
24x24 Free Pixel Icons
Letter, open
Khaki
24x24
Letter
24x24 Free Application Icons
20 Flat Icons
envelope, Email, Letter
SandyBrown
128x128
Mail icons
envelope, Letter, open
Snow
130x130
Computer & hardware
Smooth
Crystal Project
Form, stock, Dialog
DarkGray
16x16