Free · runs in your browser
SPF / DKIM / DMARC Checker
Instant domain authentication grade.
How it works
Check SPF, DKIM, and DMARC for a sending domain
Enter a domain → click Check authentication → live DNS-over-HTTPS lookup for SPF, DMARC, and common DKIM selectors. Educational snapshot — not a mail-server test.
Results appear here after you click Check authentication.
Related deliverability & DNS tools
Same category — authentication, MX health, blacklists, and placement estimates.
Send with authenticated domains via MailShrine?
Fix DNS auth here, then harvest and send from AI Email Lead Generator with pay-as-you-go credits.