Forum Discussion
Email issues after adding new domain
I'm still pretty new to the Microsoft 365 Admin Center and I was wondering if anyone has had an issue where they add a new domain for a company that was already using 365 but they changed their name ...
- Best run some message traces, they should give you a clue as to what's happening: https://docs.microsoft.com/en-us/exchange/monitoring/trace-an-email-message/message-trace-modern-eac
Also, make sure that you have configured SPF for your domain as a minimum, and preferably DKIM/DMARC as well. https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/set-up-spf-in-office-365-to-help-prevent-spoofing?view=o365-worldwide
Thanks for your response. I did run traces before, but I ran them again so I could pull the errors I am seeing. These are the common errors...
550 5.4.316 Message expired, connection refused, Socket error code 10061
554 5.7.1 [CS01] Message rejected due to local policy. Please visit https://support.apple.com/en-us/HT204137
550 5.1.0 550 #5.1.0 Address rejected
They all lead me to believe the issue is in fact on the recipients side but i'm not sure WHY these emails are being flagged. When I created the new domain, I did it directly from within the 365 Admin Center and it is currently showing that everything is good to go (Healthy or OK). Not sure what else to check after this.
Additional ideas/thoughts?
Check SPF/DKIM/DMARC records as per the article above and the references therein.
