/**
  * Builds the html section of a text/html email.
  *
  * Will return a string containing the section. Can be used to send to
  * an email server directly.
  * @return string
  */
 protected function getSectionTextHtml()
 {
     if ($this->_text_encoding == 'quoted-printable') {
         return EmailHelper::qpContentTransferEncode($this->_text_html) . "\r\n";
     } elseif ($this->_text_encoding == 'base64') {
         // don't add CRLF if using base64 - spam filters don't
         // like this
         return EmailHelper::base64ContentTransferEncode($this->_text_html);
     }
     return $this->_text_html . "\r\n";
 }