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@ 2014-05-14T06:26:51Z

<?php
if (filter_var('уникум@из.рф', FILTER_VALIDATE_EMAIL)) { 
    echo 'VALID'; 
} else {
    echo 'NOT VALID';
}

Output
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filter_var: documentation ( source)

preferences:dark modelive preview

77.5 ms | 402 KiB | 5 Q