[Sprechstunden] Delivery Status Notification (Failure)

The following message to mattia.comodi@hotmail.com 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 [DB3PR0202MB9252.eurprd02.prod.outlook.com 2026-05-08T12:25:53.591Z 08DEAC7D715C3FC4] [CH0PR03CA0369.namprd03.prod.outlook.com 2026-05-08T12:25:53.614Z 08DEACA62D605B01] [CH1PEPF0000AD7E.namprd04.prod.outlook.com 2026-05-08T12:25:53.632Z 08DEA7395D9F1F3F]"