Name and mail

How to find the mail servers for a domain

Mail to the domain bounces or lands in the wrong system. Look up MX with DNS Lookup.

Ben Fidge · · 4 min read

MX answers are a priority and a host. A lower number is preferred, and a dot target means no MX delivery.
MX answers are a priority and a host, a lower number is preferred, and a dot target means no MX delivery.

What to run

Use DNS Lookup. DNS Lookup is DNS-over-HTTPS from the browser and does not follow CNAMEs.

How to read the result

MX answers are priority plus host. Lower priority number is preferred.

A target of . or no MX means do not deliver by MX.

The page does not open port 25.

What to open next

Use DNS Lookup for A and AAAA on the MX host.

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