CourseSignal Email Auth Checker
Free email authentication checker (SPF, DKIM, DMARC)
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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.
PH · launched Nov 8, 2026 · 2 upvotes (top 19%) · 0 views
Niche: email marketing and deliverability tools · 107 launches, 7 in the last 7 days ▼ -30% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Commercial product
- Website Builder
Visit website ↗ Source listing ↗
More like this: all 107 launches in email marketing and deliverability tools →
Could you build this?
Yes Checking SPF, DKIM, DMARC and MX means querying public DNS records and explaining the results in plain language. This is a straightforward DNS-lookup web tool.
Competitors
Other products that read as similar to this one : 125 launches clear the similarity bar, closest 8 shown.
Attention rank: #15 of 126 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 306 days after the earliest competitor.
- Email Authentication Checker API · ph · 2026-10-22 · 1 upvotes · similarity 0.77
- MailSenpai DNS Check · ph · 2026-10-13 · 1 upvotes · similarity 0.75
- LayerCall Free Email-DNS Tools · ph · 2026-09-06 · 1 upvotes · similarity 0.73
- OutboundAuth · ph · 2026-10-01 · 1 upvotes · similarity 0.73
- SenderCheck · ph · 2026-10-06 · 1 upvotes · similarity 0.67
- Mail Health Report · ph · 2026-10-17 · 1 upvotes · similarity 0.67
- Prime Dev Force Security · ph · 2026-11-06 · 1 upvotes · similarity 0.66
- dmarc.quest · ph · 2026-10-25 · 2 upvotes · similarity 0.65
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.