Valid Email Regex

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I tried writing a perfect email regex which can be supported for almost every standard website like google, facebook etc.
\A[a-zA-Z0-9]*[\.?*[a-zA-Z0-9]]+@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+){1,3}\z

Please check on this regex if you find better please reply:

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