请教关于Zendframework中的Zend_Mail的有关问题

$mailTransport = new Zend_Mail_Transport_Smtp ( 
        'smtp.gmail.com', 
        array ('auth' => 'login', 'username' => 'aaa@gmail.com', 'password' => 'abc', 'ssl' => 'ssl' ) );
        $mail = new Zend_Mail ( 'utf-8' );
        $mail->setBodyHtml ( '你好xxx' );
        $mail->setSubject ( 'xxx你好' );
        $mail->setFrom ( 'aaa@gmail.com', 'aaa' );
        $mail->addTo ( 'xxx@qq.com', 'xxx先生' );
        $mail->send ( $mailTransport );