Symfony Swiftmail与雅虎一起使用

我想用Symfony SwiftMail和Gandi（roundcube）地址发送一封电子邮件。问题是什么都没发生，我不知道为什么。^^

配置yml

swiftmailer:
    transport: mail
    encryption: ssl
    auth_mode:  login
    host:      smtp
    username:  'my email'
    password:  'my mdp'

parameters.yml

parameters:
    mailer_transport: smtp
    mailer_host: 127.0.0.1:160
    mailer_user: null
    mailer_password: null

控制器：

public function contactAction()
{
    $mail = "mymail";
    $enquiry = new Contact();
    $form = $this->createForm(new EnquiryType(), $enquiry);
    $request = $this->getRequest();
    if ($request->getMethod() == 'POST')
    {
        $form->bind($request);
        $data = $form->getData();
        $message = 'Swift_Message::newInstance()
            ->setContentType('text/html')
            ->setSubject($data->getSubject())
            ->setFrom($data->getAdresse())
            ->setTo($mail)
            ->setBody($data->getMessage());
        $this->get('mailer')->send($message);
        return $this->redirect($this->generateUrl('st_contact_homepage'));
    }
    return $this->render('STCommonBundle:Default:contact.html.twig', array('form' => $form->createView()));
}

你能帮我吗？

谢谢。^^