Hi @Peter Wagner ,
Welcome to the Microsoft Q&A platform!
Exchange Server is mainly focused on the technical questions about administration, monitoring, and performance for Exchange Server.
In addition, according to my search, Smart Network Data Services (SNDS) and the Junk Mail Reporting Program (JMRP) are two services Outlook.com provides for email senders to receive feedback on their mail. So, I would suggest you could raise the question here: Results in Outlook - Microsoft Community
Thanks for your understanding and patience!
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