dnsdon
Free DNS Lookup, SSL Checker & Email Blacklist Check
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Read the full description
Paste a domain, get one report across DNS, DNSSEC, SSL, SPF/DKIM/DMARC, blacklists and WHOIS. Every finding says what we saw, what it means and how to fix it. Free, no signup. Add monitoring and readable DMARC reports when you need them.
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PH · launched Oct 28, 2026 · 1 upvote (top 67%)
- Horizontal
- Observability & eval
- Developer
- Not AI
- Commercial product
- Developer Tools
- Tech
Similar launches
See all 277 similar launches →Could you build this?
Yes Most of the report is DNS, TLS, and WHOIS lookups plus DNSBL queries and SPF/DKIM/DMARC parsing, all of which are well-documented and scriptable. Monitoring and DMARC report parsing are standard additions.
Competitors
Other products that read as similar to this one : 277 launches clear the similarity bar, closest 8 shown.
Attention rank: #108 of 278 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 361 days after the earliest competitor.
- Domain IP Lookup DNS Tracking · ph · 2026-10-20 · 1 upvotes · similarity 0.69
- MailSenpai DNS Check · ph · 2026-10-13 · 1 upvotes · similarity 0.65
- Email Authentication Checker API · ph · 2026-10-22 · 1 upvotes · similarity 0.64
- Mail Health Report · ph · 2026-10-17 · 1 upvotes · similarity 0.63
- Mailradar360 · ph · 2026-10-19 · 1 upvotes · similarity 0.63
- LayerCall Free Email-DNS Tools · ph · 2026-09-06 · 1 upvotes · similarity 0.62
- SPF & DMARC Checker · ph · 2026-10-18 · 1 upvotes · similarity 0.62
- SenderCheck · ph · 2026-10-06 · 1 upvotes · similarity 0.61
Other launches for this product
- No other launches for this product.