From ade965d7fac8359c64dc435ae128921ffd413b35 Mon Sep 17 00:00:00 2001
From: Franz Kugelmann <franz.kugelmann@elementare-teilchen.de>
Date: Tue, 20 Oct 2020 11:14:34 +0200
Subject: [PATCH] [BUGFIX] empty subject must not create error flash message

---
 Classes/Domain/Service/Mail/SendReceiverMailPreflight.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Classes/Domain/Service/Mail/SendReceiverMailPreflight.php b/Classes/Domain/Service/Mail/SendReceiverMailPreflight.php
index 377035432..c10785ead 100644
--- a/Classes/Domain/Service/Mail/SendReceiverMailPreflight.php
+++ b/Classes/Domain/Service/Mail/SendReceiverMailPreflight.php
@@ -57,6 +57,10 @@ public function sendReceiverMail(Mail $mail, string $hash = null): bool
             $this->settings
         );
         $isSent = false;
+        if (empty($this->settings['receiver']['subject'])) {
+            // avoid error flashmessage if subject is deliberately empty (and thus deactivates mailing)
+            return true;
+        }
         foreach ($receiverService->getReceiverEmails() as $receiver) {
             $email = [
                 'template' => 'Mail/ReceiverMail',