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What characters are allowed in an email address?
See RFC 5322: Internet Message Format ( and, to a lesser extent, RFC 5321: Simple Mail Transfer Protocol (

RFC 822 also covers email addresses, but it deals mostly with its structure (

In addition to ASCII characters, as of 2012 ( you can use international characters above U+007F (, encoded as UTF-8 (

For validation, see Using a regular expression to validate an email address (
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february 2018 by dusko
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