The following message to Jan.nick.dresia@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 [AM9PR03MB7252.eurprd03.prod.outlook.com 2026-04-24T11:13:23.455Z 08DEA156F8194EC3] [CWLP123CA0217.GBRP123.PROD.OUTLOOK.COM 2026-04-24T11:13:23.462Z 08DEA16132E6D6AA] [AM3PEPF0000A792.eurprd04.prod.outlook.com 2026-04-24T11:13:23.471Z 08DE9FD5372B714A]"