How to use this tool
Checks MX, SPF and DMARC separately. Add a selector to check DKIM; otherwise DKIM is explicitly marked not checked. Unrelated DNS and TXT records are excluded.
Enter the target, complete any relevant options and choose Check. Review the requested records, query outcomes and diagnostic findings. Copy Report saves the visible report.
Reading the results
No matching records and an unavailable query are different outcomes. TTLs are displayed in seconds; zero is a valid TTL. A completed request does not mean a domain passed its health checks. Only the submitted DNS owner and explicitly listed checks are inspected.
Frequently Asked Questions
Does the tool produce an email health score?
No. The current output is a generic DNS table with no pass, fail, warning, or score fields.
Does it automatically check DMARC?
No. The request does not prepend _dmarc, so a root-domain lookup does not target the normal DMARC owner.
Can it discover and verify DKIM selectors?
No. The implementation neither discovers selectors nor queries selector-specific _domainkey hostnames.
Does the page validate SPF syntax or lookup count?
No. A returned SPF string is displayed as TXT data without policy evaluation.
Can an MX row prove the mailbox service is reachable?
No. The code does not connect to SMTP servers or test acceptance of messages.
Why does a record differ from the email provider's instructions?
The DNS zone may be misconfigured or a resolver may still cache an older value. Compare the exact owner, value, and TTL.