Email Deliverability Report: SPF, DKIM, DMARC, MTA-STS

Website technology detection for up to 500 sites per run: CMS, ecommerce, analytics, tag managers, frameworks, server, CDN, payments and consent tools, with the evidence for every detection plus the third-party domains. Skips sites their robots.txt forbids, free of charge.

Bulk Email Deliverability Checker - SPF, DKIM, DMARC, MX

codeblix/email-deliverability-checker

Audit thousands of domains for email authentication, DNS issues, and deliverability risk. Checks SPF, DKIM, DMARC, MX, DNSSEC, MTA-STS, TLS-RPT, BIMI. No login, no proxy, no API keys needed.

SPF, DKIM & DMARC Checker: Email Deliverability Auditor

fayoussef/email-deliverability-auditor

Audit any domain's email deliverability in seconds. Checks SPF, DKIM (around 30 selectors), DMARC, MX, MTA-STS, BIMI and DNSSEC, tests your mail servers against DNS blacklists, and returns a 0-100 score with prioritized fixes. Bulk-ready. No login and no SMTP connection, just fast DNS.

Check email deliverability and DNS security for any list of domains: SPF, DKIM, DMARC, MX, DNSSEC, MTA-STS, TLS-RPT and BIMI audited in one run. Deterministic scoring, actionable findings, no API keys.

Email Deliverability & Domain Posture Auditor

gp005/email-deliverability-auditor

Audit email deliverability and domain posture in bulk: MX, SPF, DKIM (common selectors), DMARC policy, DNSSEC, MTA-STS, TLS-RPT, and BIMI. Returns a 0-100 posture score, a prioritized fix list, and per-record detail. Pure DNS-over-HTTPS — no scraping, no API keys.

Email Security & Deliverability Analyzer — SPF DKIM DMARC

perryay/email-security-analyzer

Enterprise email domain security audit: SPF/DKIM/DMARC/BIMI/MTA-STS DNS validation, 50+ blacklist scans, MX record analysis with IP resolution, deliverability scoring (0-100), and detailed remediation advice.

Bulk Email DNS Audit Scraper

taroyamada/email-deliverability-portfolio-audit

Try Input: 1 domain DNS/HTTPS audit ≈ USD 0.01/run. From USD 0.01/run. Paste domain and Start.

🛡️ Audit MX, SPF, DMARC, DKIM, MTA-STS, TLS-RPT, BIMI, CAA, DNSSEC, and web TLS without sending email. Get evidence-backed security and deliverability scores, prioritized fixes, and a client-ready report.

HTTP Security Headers & OWASP Posture Auditor

gp005/security-headers-auditor

Audit HTTP security response headers (CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COOP/COEP/CORP) for any URL. Returns a 0-100 grade, letter rating, and a prioritized fix list with exact header values to add. Single polite GET per URL, no crawling.

Domain Intel — WHOIS (RDAP), DNS, Email Security, SSL

yadroo/domain-intel

Domain intelligence for security, due diligence and AI agents: registrar, dates and status via RDAP, DNS over HTTPS, SPF/DMARC/DKIM audit, certificate history and subdomains from CT logs, website security headers and tech, risk flags. No API key.

GEO & llms.txt Readiness Auditor

gp005/geo-llms-auditor

Audit which AI crawlers (GPTBot, ClaudeBot, PerplexityBot, Googlebot, and 30+ more) your site allows or blocks, validate your llms.txt, and score AI-citability — with an exact prioritized fix list. Non-scraper, reads public well-known files.