send email with swift mailer and gmail account

    $transport = new Swift_SmtpTransport('smtp.gmail.com', 465, "ssl");
    $transport
        ->setUsername("<your email>")
        ->setPassword("<your password>");

    $mailer  = new Swift_Mailer($transport);
    $message = new Swift_Message();
    $message->setSubject('Votre facture')
        ->setFrom(['<from>'  => 'Test'])
        ->setTo(['<to rcpt>' => 'Test'])
        ->setBody("<h1>OK</h1>", 'text/html');
    $result = $mailer->send($message);
    dump($result);