function GetAttachmentRawData($msgno, $partnum, $encoding_id = 0)
	{
		$content = imap_fetchbody($this->mbox, $msgno, $partnum);
		
		if ($encoding_id == 3) 
		{
			return imap_base64($content);
		} 
		elseif ($encoding_id == 4) 
		{
			return imap_qprint($content);
		} 

		return $content;
	}