MX Lookup
Inspect mail exchanger records and delivery priority for a domain.
Email
Free Email DNS Checker
Check MX, SPF and DMARC together in one email-domain configuration score with clear warnings.
Your input is processed only as required by this tool.
Free Email DNS Checker
A deliverable email domain normally needs usable mail routing plus authentication policies that describe legitimate sending and handling of failures. This combined checker runs MX, SPF and DMARC lookups in parallel and turns those signals into a simple configuration score.
How to use it
- Enter the public domain you want to inspect.
- Run the DNS check and review the published email configuration returned by the authoritative DNS path.
- Use the findings together with the related SPF, DKIM, DMARC and MX checks before changing production email DNS.
How to read the result
The score rewards usable MX, one SPF record, one DMARC record and stronger DMARC enforcement. It is a configuration summary rather than a deliverability guarantee; reputation, message content, DKIM, alignment and recipient behavior also matter.
Limitations
The aggregate score intentionally stays deterministic and narrow. It does not test SMTP inboxes, sender reputation, blacklist status, message placement or every recursive SPF dependency.
Frequently asked questions
Does a score of 100 guarantee inbox delivery?
No. It means the checks represented by this tool are configured strongly; deliverability depends on many additional signals.
Why is DKIM not part of the automatic aggregate score?
DKIM lookup requires a selector, which cannot be reliably discovered for every sending provider, so it is available as a separate targeted check.