ToolsSPF checker
See which servers may send as this domain.
Check whether a domain publishes a valid SPF record and what it allows. Free, no account. Results come from live public DNS — pass, warn, or fail — not from a guessed score.
Enter a domain to look up its public DNS records. Nothing here requires an account.
Other email tools
- Email health check — Check a domain's email DNS in one pass.
- MX lookup — See where a domain's mail is delivered.
- DKIM checker — Look up the signing key at a DKIM selector.
- DMARC checker — See the domain's policy for unauthenticated mail.
These lookups read public DNS. They are not the verification chip on a connected Kontacts domain, which comes from Resend. Point a domain at Kontacts when you want a project inbox — that setup is on the mailbox page.