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Domain DMARC Checker

Check your domain for DMARC, SPF, DKIM, BIMI, TLS-RPT, MTA-STS, and other email security records.

Developer Tools
United States Estimated origin: United States

Added May 15, 2026 · Last analysed May 15, 2026 · via Hacker News · 43% unique tagline

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 15 May 2026; the live site may have changed since.

Domain DMARC Checker looks production-ready overall, with complete legal pages, well-configured email security, and fast page loads. Main gaps: missing several security headers and tracking cookies set before any opt-in.

Launched on Hacker News on May 15, 2026. The site is hosted on Vercel. We've detected 14 technologies on this site, covering analytics, security, advertising, and CSS frameworks. The stack includes Next.js, React, and Tailwind CSS.

It's on one of the most common stacks we track, shared by 10,677 launches.

If you own this site, refresh the snapshot and see the full fix list any time →

6.9
StackScope Score
Good
76/100 Launch Readiness
Well prepared
3/3* Legal
Complete*
2/2 Crawl files
Complete
Vibe Score 40 · Some AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (14)

Infrastructure
DNS Vercel DNS
Hosting Vercel
Security AbuseIPDB
HSTS
Email
Business email Google Workspace (2)
Build & Framework
CSS framework Tailwind CSS
Framework React
Meta-framework Next.js (2)
UI library shadcn/ui
Analytics & Marketing
Advertising Google Ads (3)
Analytics Google Analytics (2)
PostHog (3)
SEO Google Search Console
Tag management Google Tag Manager

Infrastructure

Network
AS16509 · US
DNS
Vercel DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Not green hosted
No green-energy record. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 4 Apr 2026 to 3 Jul 2026
Certificate as captured in this snapshot, not a live check.

Email Security

SPF ~all Soft-fail (~all). Common and accepted.
DKIM Detected via known email provider
DMARC p=reject Reject (strict). Strong.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (6)

Cookies (2)
NameLifetimeDetected as
ph_phc_yPxCCVPzp25rYddtU36aseqiNx9pLD6rZjrUp5rKA6C5_posthog 12mo PostHog
_gcl_au 2mo Google Ads
Local storage (2)
KeySizeDetected as
ph_phc_yPxCCVPzp25rYddtU36aseqiNx9pLD6rZjrUp5rKA6C5_posthog 831 B PostHog
_gcl_ls 152 B Google Ads
Session storage (2)
KeySizeDetected as
ph_phc_yPxCCVPzp25rYddtU36aseqiNx9pLD6rZjrUp5rKA6C5_posthog 90 B PostHog
ph_phc_yPxCCVPzp25rYddtU36aseqiNx9pLD6rZjrUp5rKA6C5_primary_window_exists 4 B PostHog

Readiness Breakdown How?

Custom title and meta description
Canonical URL declared
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
- Open Graph tags (title, image, description)
- Twitter card meta tags

Vibe Score Breakdown How?

SignalPoints
AI CSS signals +10
AI palette signals +5
AI stack signals +10
AI layout signals +5
Unfilled template placeholders +10

This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.

AI Stance

No AI stance declared
llms.txt published
No AI bots blocked in robots.txt
ai-train = no
search = yes
ai-input = yes
? None advertised

Well-Known Files

robots.txt
sitemap.xml (28 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/privacy
Terms of Service
/terms
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
92% unique

Security Headers (1/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Performance

76ms response time
Faster than 98% of sites
3 third-party domains loaded

Build

Code splitting
31 JS files
2 CSS files
3 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.