Enter a domain and see whether SPF, DKIM and DMARC are configured correctly. No login. No tracking.
Lists which mail servers are allowed to send email on behalf of your domain. Prevents foreign servers from borrowing your identity.
A cryptographic signature that proves the email was sent by you and hasn't been tampered with in transit.
Tells receiving servers what to do with emails that fail SPF or DKIM: ignore, quarantine, or reject.
Want to learn more? Read our guide to DMARC, DKIM and SPF.