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Mixed
Outline
Free Daily Icon Set
Email, Message, mail
Black
512x512
Mini icon set - General / Office
envelope, mail, office
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Essential Line icons
Email, mail, Letter
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Random - Crafticons
mail, Misc
Glyph
Basic icon element
Message, inbox, Text
sms, Email, mail
Technology Mix
mail, Message, telephone
Thin Line Icons for SEO and Development
envelope, Message, mail
Free Misc Icon Set 2
Delivery, Letter, mail
Email, Message, Letter
Web Icons
Email, envelope, Chat
Twitter UI Set
envelope, Email, Letter
Essentials
mail, document, Empty
envelope, Message, send
bitsies!
Letter, Communication, Email
Simple Geometric Icons
inbox, envelope, Chat
Handdrawn
Social Messaging & Productivity
post, envelope, Letter
send, Comment, mail
Simple darkcon
mail, envelope, Email
Message, Email, mail
491x512
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Simple Icons
mail, Contact
Hawcons
open, envelope, mail
mail, remove