DKIM Message Header.

Question

I am sending email from .onmicrosoft.com and getting below details in the message header which is ok to me.

But want to know why I am getting below in the header for this value for DKIM.

Answer 1

The only one that matter is: Authentication-results
https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/anti-spam-message-headers?view=o365-worldwide

You can ignore the "Original" header. that is simply stamped from the originating server and doesnt reflect the final results as the message was sent through the 365 transport systems.