<?php
$a = filter_var('xa@a163.com',FILTER_VALIDATE_EMAIL);
$site = explode('@',$a);
$result = checkdnsrr($site[1],'mx');
echo($result);
?>
$a = filter_var('xa@a163.com',FILTER_VALIDATE_EMAIL);
$site = explode('@',$a);
$result = checkdnsrr($site[1],'mx');
echo($result);
?>
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