$mailFrom = GrapheConfig::get('app_admin_email');
$mailTo = $request->getParameter('email');
$mailSubject = 'Merci pour votre pré-inscription!';
/*$view = new sfPartialView($this->getContext(), $this->getModuleName(), $this->getActionName(), 'confirmMail');
$view->setTemplate('_confirmMail.php');
$mailBody = $view->render();*/
$message = Swift_Message::newInstance();
$logo = $message->embed(Swift_Image::fromPath(sfConfig::get('sf_web_dir').'/images/subscribe/bienvenue.jpg'));
// or
$logo = image_path('/images/pro/logo.png', true);
$mailBody = $this->getPartial('confirmMail', compact('logo'));
$message->setFrom($mailFrom)
->setTo($mailTo)
->setSubject($mailSubject)
->setBody($mailBody);
$message->setContentType('text/html');
$this->getMailer()->send($message);