Free Toolkit
Email Header Analyzer
Paste raw email headers to instantly verify SPF, DKIM, and DMARC authentication, trace the delivery path, and diagnose inbox placement issues.
How to find your email headers
Paste email headers
Want bulletproof authentication on every send?
Mailflo automatically configures SPF, DKIM, and DMARC for all your sending domains — so every email you send passes this analyzer with a perfect score.
See Mailflo plans