diff --git a/ambient_toolbox/mail/backends/whitelist_smtp.py b/ambient_toolbox/mail/backends/whitelist_smtp.py
index 381bd1d..29c1755 100644
--- a/ambient_toolbox/mail/backends/whitelist_smtp.py
+++ b/ambient_toolbox/mail/backends/whitelist_smtp.py
@@ -74,4 +74,4 @@ def send_messages(self, email_messages):
         Uses regular smtp-sending afterwards.
         """
         email_messages = self._process_recipients(email_messages)
-        super().send_messages(email_messages)
+        return super().send_messages(email_messages)