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Social media
Glyph
Twitter UI - Flat
envelope, Message, Chat
Black
512x512
Signs & symbols
Outline style
envelope, Message, mail
Business & finance
Font Awesome
envelope, O
envelope, square
envelope
Network & communications
Communication icon
send icon, mail, messages
Orange
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Free Red Social Media Icons
mails, envelopes, red
Chocolate
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Miscellany Web icons
Email, Letter, mail
Files & folders
Mail icons
envelope, Message, Email
Email, open, Message
mail, Email, Letter
Letter, envelope, Email
mail, Email, Message
Mixed
Web Icons
Email, envelope, Chat
Cloud Computing
Letter, Communication, Cloud
DarkSlateGray
envelope, Email, mail
UI
Basic interface
Email, mail, inbox
betterwork social
mail, post, Communication
square, envelope, Message
Simple Geometric Icons
inbox, envelope, Chat
iOS7 optimized
Miu
send, postcard, mail
mail, Common, Email
Letter, envelope, mail
envelope, mail, send