dns-auth-check

Validate SPF, DKIM, DMARC, BIMI and MTA-STS from the command line.

Brought to you by: stevenkop

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Last Update: 2026-07-07

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Zero-dependency Node.js CLI that validates SPF, DKIM, DMARC, BIMI and MTA-STS email authentication for any domain. Counts recursive SPF lookups against the RFC 7208 limit, auto-discovers DKIM selectors across 18 common providers, and grades the result A+ to F with fix suggestions. CI-friendly.

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