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 [AS8PR03MB7031.eurprd03.prod.outlook.com 2026-04-30T06:15:06.047Z 08DEA58F69FA56A1] [CWLP265CA0346.GBRP265.PROD.OUTLOOK.COM 2026-04-30T06:15:06.055Z 08DEA5A1C51916FC] [AMS0EPF000001A7.eurprd05.prod.outlook.com 2026-04-30T06:15:06.051Z 08DE9FC493C9B6A1]"