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CourseSignal Email Auth Checker

Free email authentication checker for course and coaching domains. Test SPF, DKIM, DMARC and MX in your browser. Nothing is stored. A free, client-side email authentication checker for course creators and coaches. Check …

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Free email authentication checker for course and coaching domains. Test SPF, DKIM, DMARC and MX in your browser. Nothing is stored. A free, client-side email authentication checker for course creators and coaches. Check public SPF, DKIM, DMARC and MX records, get plain-English explanations, and investigate common setup issues before your next broadcast. No sign-up or email address required.

Discovery history

  1. Product Hunt 新品

    Nov 8, 2026 · 1 observations

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