yii\mail\BaseMailer::afterSend PHP Method

    public function afterSend($message, $isSuccessful)
    {
        $event = new MailEvent(['message' => $message, 'isSuccessful' => $isSuccessful]);
        $this->trigger(self::EVENT_AFTER_SEND, $event);
    }

 /**
  * This method is invoked right after mail was send.
  * You may override this method to do some postprocessing or logging based on mail send status.
  * If you override this method, please make sure you call the parent implementation first.
  *
  * Note: as of Yii 2.0.0-beta - hardcoded swiftmailer methods result in UnknownMethodException in debug MailPanel,
  * for patch @see https://github.com/yiisoft/yii2/commit/3838b501babc1f5b9e6b0ba452512fba136d3102
  *
  * @param \yii\mail\MessageInterface $message
  * @param boolean                    $isSuccessful
  */
 public function afterSend($message, $isSuccessful)
 {
     parent::afterSend($message, $isSuccessful);
 }