InboxProof: 'Will My Email Land?' Tester
A free diagnostic tool where you paste an email header or send a test message, and it tells you — in plain English with a clear red/yellow/green — whether your authentication (DMARC, DKIM, SPF) is healthy, with concrete steps to fix what's broken.
Marketing managers, founders, and IT generalists who don't know what DMARC is but know emails are landing in spam
- Paste-an-header 'explain my email security' analyzer with red/yellow/green verdict
- Free deliverability test inbox you can send to and get a full report
- Auto-generated fix-it checklist mapped to your DNS provider
- Optional $19/mo upgrade for continuous monitoring
Posts like the recent np/DNSSEC incompatibility show authentication is getting more complex, not less, while small businesses have no clue what any of these acronyms mean.
The trend source itself only drew 16 HN points, suggesting niche rather than viral interest, though DMARC adoption data shows real top-domain usage; non-technical SMBs largely delegate to ESPs/MSPs rather than standalone checkers.DMARCbis Adoption Data (DMARC2) ↗Why DMARC's new "NP" tag can fail with DNSSEC | Hasty Briefs ↗
Space is crowded: MXToolbox, Mail-Tester.com, Postmark's free checkers, learndmarc.org cover basic free checks; Valimail, dmarcian, EasyDMARC, OnDMARC dominate paid DMARC monitoring; a plain-English R/Y/G tool is a real but narrow differentiation, not a wide-open market.Summary of Changes in DMARCbis ↗Compatibility of "np" tag with RFC 9824 ↗
One-shot 'is my config broken?' checks are commoditized as free tools; recurring value comes from ongoing monitoring which Valimail/dmarcian already sell at $50–$500+/mo, leaving little pricing room or WTP signal for a newcomer without hard pricing evidence in the search results.DMARCbis Adoption Data (DMARC2) ↗Why DMARC's new "NP" tag can fail with DNSSEC | Hasty Briefs ↗
DMARCbis moving from Informational to Standards Track, RFC 9989 NP tag, RFC 9824 DNSSEC interactions, and Gmail/Yahoo enforcement signals a multi-year active evolution of the auth ecosystem — strong durable demand for diagnostic tooling.Summary of Changes in DMARCbis ↗DMARC NP tag with DNSSEC (HN Remix) ↗
DMARC/SPF/DKIM checks reduce to standard DNS lookups and header parsing against well-documented RFCs; trivially buildable solo with existing open-source libraries, only the plain-English remediation copy requires product design effort.