This is the "at" symbol for email. It is a lower case letter a. The straight line of the letter curves around the letter in a counter-clockwise circle. It overlaps where it begins, leaving the lower case letter a encircled in one continuous line.
field types for ios 7: email, password, name, gender, age, etc...
关于 电子邮件 故事的图标
Mails have been the answer to long distance communication since several centuries ago. Many relationships have sprung from the power of the mail. Exchanging letters back and forth through snail mail was as common as sending a series of carefully selected emojis today.
Mails date back almost as early as the invention of writing. The first organized courier service was started by the Pharaohs in Egypt, where they sent official orders through a courier. The earliest surviving copy of a mail is dated 255 BC, and was written in Egyptian language.
Early forms of the envelope, the most common icon denoting mail, are closely linked with Babylonians. The first envelopes were made of cloth, animal skins, and vegetable parts.
This form of communication has certainly come a long, long way from then. The invention of emails revolutionized the way letters are sent. The first ever email sent was by Ray Tomlinson to himself, with a message containing random letters. And from mere words, emails can now carry practically anything digital.
Here you can get free mail icon in PNG, download large or small email icon, choosing size you need (PNG bigger than 100px require the license).
The other symbols that go together with the envelope are:
Inbox—where thousands of your unread emails go
At sign (@)—common signifier of emails
Paper plane—usually used as a sent button
Years from now, we can only expect mails to carry things beyond our imagination, e.g. a dollar bill from the tooth fairy and gifts from Santa.