I have a weird issue with an Microsoft 365 account on a sub-domain. I’ve been going around in circles with Microsoft support for weeks, but they are not very helpful.
We manage 100s of tenants in our Partner Portal and never had a problem like this.
We set up a 365 account and add a sub-domain to the account and then create a few email addresses on that sub-domain. The problem is that any email sent to those addresses does not resolve properly, although everything seems to be set up correctly. Microsoft says the domain is “healthy” and any MX record checker out there show the correct MX record.
The sub-domain is ma.instituteofhairandbeauty.com.au
Here is a sample bounce message I got sending an email from my personal account, but any email sent to the address gets the same bounce message after a while:
The sub-domain itself is connected to a Wix website via an A record. And that’s the same IP address I see in the bounce message. Maybe it has something to do with that?