Free Tools

Email authentication tools

Diagnose, understand, and validate your email authentication setup. No account required.

Supertool

One box for every domain check

Type a domain for a full report, or scope it with dmarc:, spf:, dkim:, mx:, mta-sts:, tls-rpt:, bimi:, blacklist:, dns:, ptr:, dnssec:, or whois:.

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Analyze & diagnose