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产品详情
CourseSignal Email Auth Checker
Free email authentication checker (SPF, DKIM, DMARC)
- 发布日期 · UTC
- 2026-11-08
- 产品域名
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- 域名后缀
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- 产品方向
- 开发者工具
关于产品
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.
关键词
dns recordemail authenticationemail deliverability