headers wont update after change are done to comply with googles new rules

[MN2024]

headers in the outgoing mail are not updated after I made changes to be updated to Google and Yahoo's new rules. I have followed all the steps and added all the records. When I do an online check in the mx.look up tool, everything looks ok. But headers do not want to be updated in O365. What to do ? 

[#2]

answering my own question for future answers. It turns out that if you check headers on emails within the same domain/subdomain, the header is not displayed correctly. You have to email a service that is outside the domain and has dkim control. So I email an outlook.com account.
When we examined the header there, it turned out to be correct. so the issue is resolved

[#3]

@MN2024 

Thanks for sharing the resolution. It will help others with the same question.

/Teresa