MAGETWO-54580: [Github][PR] added partial fix for issue #2617. #3688

- Added message to clarify and prevent future changes.

Author: Hayder Sharhan

app/code/Magento/Newsletter/Model/Subscriber.php

@@ -442,6 +442,7 @@ public function subscribe($email)
         $this->setStatusChanged(true);
 
         try {
+            /* Save model before sending out email */
             $this->save();
             if ($isConfirmNeed === true
                 && $isOwnSubscribes === false