note 74809 deleted from function.checkdnsrr by googleguy

Note Submitter: reportingsjr at gmail dot com ---- Here is a modification to the note below: function check_email($email) { if(preg_match('/^\w[-.\w]*@(\w[-._\w]*\.[a-zA-Z]{2,}.*)$/', $email, $matches)) { if(function_exists('checkdnsrr')) { if(checkdnsrr($matches[1] . '.', 'MX')) return true; if(checkdnsrr($matches[1] . '.', 'A')) return true; }else{ if(!empty($hostName)) { if( $recType == '' ) $recType = "MX"; exec("nslookup -type=$recType $hostName", $result); foreach ($result as $line) { if(eregi("^$hostName",$line)) { return true; } } return false; } return false; } } return false; } This makes it compatible with windows and will make sure it actually checks the domain.