Free DNS checker · SPF · DKIM · DMARC · MX

Check the domain before the OTP.

Run public DNS checks for mail authentication, DMARC alignment readiness, and Gmail/Yahoo sender-requirement gaps before transactional email goes live.

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SPF / DKIM / DMARC / MX

Domain mail posture

Public DNS checks for transactional email readiness and Gmail/Yahoo sender requirements.

Transactional email stays stricter when marketing stays out.

Send OTPs from a domain that is ready.

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