public function getRawHeader($name)
{
$name = strtolower($name);
if (isset($this->parts[1])) {
$headers = $this->getPart('headers', $this->parts[1]);
return isset($headers[$name]) ? $headers[$name] : false;
} else {
throw new Exception('setPath() or setText() or setStream() must be called before retrieving email headers.');
}
}