code: protected function sendEmails(ContactInquiry $inquiry)
      {
          $recipients = $this->container->getParameter('c33s_contact_form.email.recipients');
          if ($this->container->getParameter('c33s_contact_form.email.send_copy_to_user') && $inquiry->hasSenderEmail()) {
              $recipients[] = $inquiry->getSenderEmail();
          }
  
          if (empty($recipients)) {
              return;
          }
  
          $translator = $this->get('translator');
  
          $subject = $this->container->getParameter('c33s_contact_form.email.subject');
  
          $message = \Swift_Message::newInstance()
              ->setSubject($translator->trans($subject, array(), 'C33sContactForm'))
              ->setFrom($this->container->getParameter('c33s_contact_form.email.sender_email'))
              ->setTo($recipients)
              ->setBody(
                  $this->renderView(
                      'C33sContactFormBundle:ContactForm:email.txt.twig',
                      array('inquiry' => $inquiry)
                  )
              )
          ;
  
          $this->get('mailer')->send($message);
      }
docs: Send all notification emails for the given inquiry object.
  
  @param ContactInquiry $inquiry