[TASK] 1519 added better error messages for the newsletter

Classes/Controller/NewsletterController.php

@@ -428,13 +428,14 @@ class NewsletterController extends ActionController {
 
 				foreach ($recipients as $recipient) {
 					try {
-						$mailTemplateService->setToAddresses($recipient['email']);
+						$mailTemplateService->setToAddresses($recipient['username']);
 						$mailTemplateService->setMarkers(['user' => $recipient]);
 						// no real error handling here, one must check the MailQueue
 						$mailTemplateService->sendEmail(FALSE);
 					} catch (\Exception $e) {
 						// Invalid email address could not be loaded to queue
-						$errorRecipients[] = $recipient['username'];
+						$errorRecipients[] = $recipient['uid'] . ' - '
+							. $recipient['username'] . ' (' . $e->getMessage() . ')';
 					}
 				}
 				$mailIsSend = TRUE;