MX Lookup
Find mail servers and delivery priorities.
MX records tell other mail servers where to deliver a domain's email. An MX lookup returns each mail host and its priority number — lower numbers are tried first, and equal numbers share the load.
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Public internet targets onlyResults
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How MX Lookup works
What it does
Find mail servers and delivery priorities.
What you get
Mail server hostnames and delivery priority numbers.
Live data sources
The target is sent to a network provider. Results include their source; timeouts and unavailable data are clearly marked.
What if a check cannot finish?
Confirm your input and try again. A timeout, blocked request, or unavailable provider is not proof that a domain is broken. Internet measurements and third-party services have limits.
MX Lookup — frequently asked questions
What does the priority number mean?
It is preference order, not quality. A sender tries the lowest number first and falls back to higher ones if it cannot connect. Equal values are used round-robin.
My domain has no MX record. Can it still receive mail?
Senders fall back to the address record in that case, but many will not. If you want mail, publish an MX record explicitly.
Should an MX record point to an IP address?
No. An MX must name a hostname that has its own A or AAAA record. Pointing it straight at an IP is invalid and some senders reject it.