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Discussion on: There's only one way to validate an email address

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alohci profile image
Nicholas Stimpson

Agreed. To understand how complex matching an email address is, the specification for them is RFC5322. But the HTML5 email input box validation doesn't follow it, and its spec has this to say:

This requirement is a willful violation of RFC 5322, which defines a syntax for e-mail addresses that is simultaneously too strict (before the "@" character), too vague (after the "@" character), and too lax (allowing comments, whitespace characters, and quoted strings in manners unfamiliar to most users) to be of practical use here.

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