O365 tenant/domain DNS hosting MX record question...

[Koldov]

Probably a really basic question (but therefore hopefully a quick and simple, unified answer)....

 

We have a domain (sch.uk), we have an O365 tenant that uses this domain but we don't actually use it in anger as such (long story).

 

The domain is registered to us, with our registrar (not NOMINET) and I have pointed the www DNS (A) record to the school website (different domain).

 

There are MX records currently, but I don't see them pointing to O365, it seems that it is indicating that the registrar is processing mail (?) does that even make sense?

 

Although we don't use it, it is dormant for if we ever do and I'd like to keep an eye on what's happening to it so have forwarded the admin email to one I do monitor (does anyone know if all global admins are notified of changes or only the built-in postmaster or admin - onmicrosoft - accounts?).

 

Given all the above do I need to do anything with MX records, or can O365 sort itself out?

 

EDIT: Apparently not as I am getting 'undeliverable' on test emails to a user on that tenant!

[andy_b]

Personally I'd pull the domain (sch.uk) into my active Tenant. Ditch the old Tenant and setup any existing email addresses as an alias to relevant accounts.

[chaplic]

To answer your direct question, there's no need for the MX records to point at O365 to receive email out of that tenant and/or from that domain. You do want to sort SPF though. Though I would echo the other advise to get it on your prod tenant.