Symfony 3.1 swiftmailer email doesn't send -

i wanted send test email using symfony 3.1 , swiftmailer, doesn't work. reading other solutions, still doesn't work.

config.yml:

swiftmailer:     transport: %mailer_transport%     encryption: %mailer_encryption%     auth_mode:  %mailer_auth_mode%     host:      %mailer_host%     username:  %mailer_user%     password:  %mailer_password%     spool:     { type: memory } 

parameters.yml

mailer_transport: smtp     mailer_encryption: ssl     mailer_auth_mode: login     mailer_host: smtp.gmail.com     mailer_user: user@gmail.com     mailer_password: mypass 

parameters.yml v.2 trying:

 mailer_transport: gmail         mailer_encryption: ssl         mailer_auth_mode: login         mailer_host: smtp.gmail.com         mailer_user: user@gmail.com         mailer_password: mypass 

controller:

public function contactaction(request $request)     {         $name = $request->request->get('name');         $surname = $request->request->get('surname');         $email = $request->request->get('email');         $subject = $request->request->get('subject');         $message = $request->request->get('message');         $data = "";         if($request->request->get('contact_submit')){              $message = \swift_message::newinstance()                 ->setsubject($subject)                 ->setfrom($email)                 ->setto('myemail@gmail.com')                 ->setbody($message);              $this->get('mailer')->send($message);              $data = "thank you: $name";          }         return $this->render('przedszkole/contact.html.twig', array('data' => $data));           } 

so after click submit, view change , show me: thank $name, don't email :/

i change security lvl of gmail e-mail tell in other solutions, doesn't me :/

i uncomment swiftmailer: delivery_adress in config_dev.yml.

i grateful :/

how use (only) following yml config:

mailer_transport: gmail      mailer_user: user@gmail.com      mailer_password: mypass 

i read there default settings don't need set gmail , maybe because setting, has effect. i'm not sure if fix problem, can try it.