Валидация логина preg_match

$str = "195426,Россия@ПЕРЕДОВИКИ!ru";
$result = preg_match("/^[0-9]{6},[а-яА-Я]{1,10}@[А-Я]{1,15}![c-yA-X-.]*$/",$str);
var_dump($result); // int(1)

$re = '/^[0-9]{6},[ЁА-яё]{1,10}@[А-Я]{1,15}![c-yA-X.-]*$/u';
foreach([
    '195426,Россия@ПЕРЕДОВИКИ!ru', 
    '123456,А@Я!', 
] AS $s){
    echo var_export(preg_match($re, $s), 1), ': ', $s, "\n";
}

$regexp0 = "/^(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){255,})(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){65,}@)(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E\\pL\\pN]+)|(?:\\x22(?:[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x21\\x23-\\x5B\\x5D-\\x7F\\pL\\pN]|(?:\\x5C[\\x00-\\x7F]))*\\x22))(?:\\.(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E\\pL\\pN]+)|(?:\\x22(?:[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x21\\x23-\\x5B\\x5D-\\x7F\\pL\\pN]|(?:\\x5C[\\x00-\\x7F]))*\\x22)))*@(?:(?:(?!.*[^.]{64,})(?:(?:(?:xn--)?[a-zа-я0-9]+(?:-+[a-zа-я0-9]+)*\\.){1,126}){1,}(?:(?:[a-zа-я][a-zа-я0-9]*)|(?:(?:xn--)[a-zа-я0-9]+))(?:-+[a-zа-я0-9]+)*)|(?:\\[(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){7})|(?:(?!(?:.*[a-f0-9][:\\]]){7,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?)))|(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){5}:)|(?:(?!(?:.*[a-f0-9]:){5,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3}:)?)))?(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))(?:\\.(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))){3}))\\]))$/iDu";
 
$email ='мыло@саит.рф';
 
if (preg_match($regexp0, $email) === 1) {
    echo 'Валидно', PHP_EOL;
} else {
    echo 'Не валидно', PHP_EOL;
}