Question 1

What does an MX lookup tool check?

Accepted Answer

An MX lookup fetches the public mail-exchange records for a domain so you can confirm which inbound mail servers are advertised, what priorities they use, and whether the routing looks consistent with the provider you expect.

Question 2

Why should teams run an MX record check after migrations?

Accepted Answer

MX changes often look complete in a DNS console before the live routing state is fully validated. A lookup confirms the public result after provider cutovers, tenant moves, or recovery changes.

Question 3

What if no MX record is found?

Accepted Answer

Some domains intentionally do not receive email, but for production sender or support domains this usually means inbound routing is incomplete or published on the wrong zone.

Question 4

Does MX lookup replace SPF, DKIM, or DMARC checks?

Accepted Answer

No. MX lookup answers the inbound routing question. Sender trust still depends on SPF, DKIM, and DMARC when outbound delivery reliability matters.

Free MX lookup and mail server checker

Check the live MX routing for a domain