Free email DNS tools.
Look up MX, SPF, DKIM and DMARC for any domain. No account. Results are pass, warn or fail from live public DNS — not a made-up score.
Email health check
Check a domain's email DNS in one pass.
MX lookup
See where a domain's mail is delivered.
SPF checker
See which servers may send as this domain.
DKIM checker
Look up the signing key at a DKIM selector.
DMARC checker
See the domain's policy for unauthenticated mail.
These tools read public DNS. They are not the verification chip on a connected Kontacts domain, which comes from Resend.