How to use this check
Enter a domain to see MX records, priority order and whether the selected hosts resolve publicly.
The API reads MX, then validates a small number of MX hosts through public A/AAAA resolution.
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DNS records
Live DNS checkMX Checker
Inspect mail exchanger priority, host shape and public resolution before debugging delivery.
Health score--Live DNS check
Signal checklist
The result lists MX hosts, priorities, public address counts and warnings for missing records.
MX Checker
Enter a domain to see MX records, priority order and whether the selected hosts resolve publicly.
Result
The result lists MX hosts, priorities, public address counts and warnings for missing records.
Support
Keep this free result available
Use the result first. Support and promotional areas stay separate from the useful result.
- Useful result first
- No signup required
- Promotions kept separate
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Guide and interpretation
How to interpret the result
Lower priority values are tried first. Missing or private-only MX hosts usually block inbound mail.
Example
A domain can publish priority 10 mail1.example.com and priority 20 mail2.example.com for fallback.
Common issues and next steps
An MX host can exist but point to private or stale addresses after provider migration.
Confirm the MX host belongs to the current mail provider and resolves to public addresses.
Methodology and limits
The free check is a point-in-time DNS view and does not verify mailbox acceptance.
FAQ
Does MX prove outgoing mail is configured?
No. MX controls inbound delivery; SPF, DKIM and DMARC are usually more relevant for outbound authentication.
Why are only some hosts probed?
The free check limits host and address checks to reduce abuse and latency.