MailfloFree Tools
Free Toolkit

SPF / DKIM / DMARC Checker

Enter any domain to instantly look up and validate its email authentication records. Results are fetched live from DNS — no caching.

Try:

Will check 19 common selectors in parallel and return the first match.

SPF

Specifies which mail servers are authorized to send email for your domain.

DKIM

Adds a cryptographic signature to every email so receivers can verify it wasn't tampered with.

DMARC

Tells receiving servers what to do when SPF or DKIM fails — and where to send reports.

Want SPF, DKIM, and DMARC set up automatically?

Mailflo configures all your email authentication records for every sending domain — so every check on this tool comes back green.

See Mailflo plans