public static function execute($subject, $to, $from, $body)
{
sfOpenPNEApplicationConfiguration::registerZend();
$subject = mb_convert_kana($subject, 'KV');
$mailer = new Zend_Mail('iso-2022-jp');
$mailer->setHeaderEncoding(Zend_Mime::ENCODING_BASE64)->setFrom($from)->addTo($to)->setSubject(mb_encode_mimeheader($subject, 'iso-2022-jp'))->setBodyText(mb_convert_encoding($body, 'JIS', 'UTF-8'), 'iso-2022-jp', Zend_Mime::ENCODING_7BIT);
$result = $mailer->send();
Zend_Loader::registerAutoLoad('Zend_Loader', false);
return $result;
}