[Sprechstunden] Delivery Status Notification (Failure)

The following message to ellen-just@outlook.de was undeliverable. The reason for the problem: 5.3.0 - Other mail system problem 550-"5.7.515 Access denied, sending domain LISTS.FSMPI.RWTH-AACHEN.DE doesn't meet the required authentication level. The sender's domain in the 5322.From address doesn't meet the authentication requirements defined for the sender. To learn how to fix this see: https://go.microsoft.com/fwlink/p/?linkid=2319303 Spf= Pass , Dkim= Fail , DMARC= Pass [AS2PR08MB10268.eurprd08.prod.outlook.com 2026-03-10T07:15:06.588Z 08DE7D020063F19C] [AM0P190CA0007.EURP190.PROD.OUTLOOK.COM 2026-03-10T07:14:46.751Z 08DE7E5751557BBD] [AM2PEPF0001C711.eurprd05.prod.outlook.com 2026-03-10T07:15:06.586Z 08DE79A0F4DFCDAA]"