The following message to johann.soetbeer@outlook.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 [PH0PR01MB6619.prod.exchangelabs.com 2026-05-04T19:16:38.054Z 08DEA912B2D72168] [MN2PR03CA0018.namprd03.prod.outlook.com 2026-05-04T19:16:38.079Z 08DEA901A4C430CD] [BL02EPF0001A0FF.namprd03.prod.outlook.com 2026-05-04T19:16:38.089Z 08DEA71CE3979C0E]"