Email · Fix guide
Null MX detected
- MX
- Mail Exchanger
A null MX explicitly says that the domain accepts no inbound email.
What is a null MX?
A null MX is a deliberate DNS statement that a domain accepts no email. It uses priority zero and a single dot as its target, preventing other servers from wasting time attempting delivery.
What to do next
- Leave it in place if the domain should never receive mail.
- Remove it before adding normal MX records if mail is required.
How to verify the fix
Confirm the record is exactly priority 0 with a target of a single dot.
When this result may be wrong
This is a pass when intentional, but wrong if users expect mailboxes at the domain.
Ready to check again?
Check a domain
Run a fresh report after DNS caches and platform changes have had time to update.