note 102398 added to filter.filters.validate

FILTER_VALIDATE_EMAIL is discarding valid e-mail addresses containing IDN. Since there are real, live IDNs on the Internet, that means the filtered output is too strict, leading to false negatives.

Punycode-encoded IDN addresses pass the filter correctly; so before checking for validity, it is necessary to convert the e-mail address to punycode.
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Server IP: 92.48.74.199
Probable Submitter: 82.113.54.210
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Manual Page -- http://www.php.net/manual/en/filter.filters.validate.php
Edit        -- https://master.php.net/note/edit/102398
Del: integrated  -- https://master.php.net/note/delete/102398/integrated
Del: useless     -- https://master.php.net/note/delete/102398/useless
Del: bad code    -- https://master.php.net/note/delete/102398/bad+code
Del: spam        -- https://master.php.net/note/delete/102398/spam
Del: non-english -- https://master.php.net/note/delete/102398/non-english
Del: in docs     -- https://master.php.net/note/delete/102398/in+docs
Del: other reasons-- https://master.php.net/note/delete/102398
Reject      -- https://master.php.net/note/reject/102398
Search      -- https://master.php.net/manage/user-notes.php