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A comment on The Correct Way to Validate Email Addresses. Parent comment

Re:The Correct Way to Validate Email Addresses by danso on Wednesday September 07, 2016 @07:46PM (#12449001)
How about more than one @ sign? Does the email address spec exclude the possibility of more than one @ symbols?
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Re:The Correct Way to Validate Email Addresses by tempestn on Wednesday September 07, 2016 @07:56PM (#12449060)
It doesn't matter. If they have typed an @, they probably understand that it's an email field. Trying to validate to the spec beyond that is pointless, for reasons thoroughly covered in the article.
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Re:The Correct Way to Validate Email Addresses by kej on Wednesday September 07, 2016 @07:54PM (#12449042)
Nope, that's valid if one of them is quoted: "[email protected]"@example.com
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Re:The Correct Way to Validate Email Addresses by ediblenergy on Thursday September 08, 2016 @01:19PM (#12454998)
It actually used to (maybe still does) signal routing information[1]. An example from the RFC is "@ONE,@TWO:JOE@THREE" [1]: https://tools.ietf.org/html/rfc821
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Re:The Correct Way to Validate Email Addresses by zeveb on Thursday September 08, 2016 @11:05AM (#12453662)
The local-part may contain a quoted @: "@"@example.invalid is a valid email address.

@ signs are also permitted in comments: (ted@home)[email protected] is also a valid email address.

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