note 10675 modified in function.getmxrr by felipe

Prevent your dns server from 'creating' a valid host name by appending the local domain to incomplete emails by appending to the domain a trailing . both in the pattern match and mx checks: <?php if (eregi("^[0-9a-z_]([-_.]?[0-9a-z])*@[0-9a-z][-.0-9a-z]*\\.[a-z]{2,3}[.]?$", $string, $check)) { $host = substr(strstr($check[0], '@'), 1)."."; if ( getmxrr($host, $validate_email_temp) ) return TRUE; // THIS WILL CATCH DNSs THAT ARE NOT MX. if(checkdnsrr($host,"ANY")) return TRUE; } ?> --was-- Prevent your dns server from 'creating' a valid host name by appending the local domain to incomplete emails by appending to the domain a trailing . both in the pattern match and mx checks: if (eregi("^[0-9a-z_]([-_.]?[0-9a-z])*@[0-9a-z][-.0-9a-z]*\\.[a-z]{2,3}[.]?$", $string, $check)) { $host = substr(strstr($check[0], '@'), 1)."."; if ( getmxrr($host, $validate_email_temp) ) return TRUE; // THIS WILL CATCH DNSs THAT ARE NOT MX. if(checkdnsrr($host,"ANY")) return TRUE; } return FALSE; http://php.net/manual/en/function.getmxrr.php