Untitled

/**
 * @Route("testmail", name="testmail")
 */
public function testmail(Request $request)
{

    $societe = null;
    $form = $this->createFormBuilder()
        ->add('Societe', TextType::class, array('label' => 'Société'), array('constraints' => array(new NotBlank(array()),
            new Length(array('min' => 2,
                'max' => 25)))))
        -> add('send',SubmitType::class, array('label' => 'Cotation'))

        ->getForm();

    $form->handleRequest($request);

    if ($form->isValid()) {
        if ($request->isMethod('POST')) {
            $societe = $form["Societe"]->getData();

            $message = Swift_Message::newInstance()
                ->setSubject('Etude Financiere')
                ->setFrom('wolffvianney@gmail.com')
                ->setTo('vianney.wolff@yahoo.fr')
                ->setCharset('utf-8')
                ->setContentType('text/html')
                ->setBody($this->render('@gkeep/Finance/email.html.twig', array('Societe' => $societe)));

            $this->get('mailer')->send($message);


        }
    }

    return $this->render('@gkeep/Finance/finance.html.twig', array('form' =>$form->createView(),
    'Societe'=>$societe));


}

swiftmailer:
transport: '%mailer_transport%'
host: '%mailer_host%'
username: '%mailer_user%'
password: '%mailer_password%'
spool: { type: memory }

mailer_transport: mail
mailer_host: smtp.gmail.com
mailer_user: wolffvianney@gmail.com
mailer_password: *mypasswordforwolffvianney@gmail.com*
secret: thesecret

<html>
hi
société : {{ Societe }}
</html>