code: public function createMessage()
      {
          $eventsManager = $this->getEventsManager();
          if ($eventsManager) {
              $eventsManager->fire('mailer:beforeCreateMessage', $this);
          }
  
          /** @var $message Message */
          $message = $this->getDI()->get('\Baka\Mail\Message', [$this]);
          if (($from = $this->getConfig('from'))) {
              $message->from($from['email'], isset($from['name']) ? $from['name'] : null);
          }
  
          if ($eventsManager) {
              $eventsManager->fire('mailer:afterCreateMessage', $this, $message);
          }
          return $message;
      }
docs: Overwrite this funciton to use ower mail message
  
  Create a new Message instance.
  
  Events:
  - mailer:beforeCreateMessage
  - mailer:afterCreateMessage
  
  @return \Phalcon\Mailer\Message