Email Security Audit (SPF, DMARC, DKIM, MX)

DMARC & Email Security Checker

taroyamada/dns-dmarc-security-checker

Try for free → Input → Start (1 domain ≈ USD 0.008 total). Validate domain infrastructure in bulk to boost email deliverability. Extract DMARC policies, SPF records. From USD 0.008 total.

Security Headers Checker — OWASP HSTS CSP Bulk Audit

taroyamada/security-headers-checker

Try for free → Input → Start (1 URL header audit ≈ USD 0.008/run). Security headers checker: HSTS, CSP, and OWASP header bulk audit across URLs. Paste domains and export. From USD 0.008.

Bulk Email Health: SPF, DMARC, DKIM & MX Checker

cottony_brittlegill/domain-mailhealth-bulk

Bulk email deliverability and security audit: MX, SPF, DMARC and DKIM (common selectors) for up to 100,000 domains in one normalized JSON per domain, with an A-F grade and actionable issues. Failed lookups are never charged.

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.

Bulk-audit domains: email provider (Google Workspace, Microsoft 365...), SPF, DKIM, DMARC policy, MX, DNS host, SSL expiry, security headers and SaaS tools revealed by DNS. Deliverability score per domain.

Email Security Checker — SPF, DKIM, DMARC & MX Audit

factpipe/email-security-checker

Audit any domain's email authentication: SPF (lookups, -all), DMARC policy, DKIM keys, MX, MTA-STS and TLS-RPT, with a 0-100 score and fix list. Bulk domains, no key. $3 per 1,000 domains.

Audit any domain's email and web security in seconds: SPF, DMARC, DKIM, DNSSEC, MTA-STS, BIMI, CAA, SSL certificate expiry and HTTP security headers. A-F grade plus prioritized fixes. Bulk lists or one domain at a time for AI agents.

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.

Domain WHOIS & DNS Lookup - Bulk Domain Intelligence

santamaria-automations/domain-whois-dns

Bulk domain intelligence — WHOIS records (registrar, dates, contacts), DNS records (A, MX, TXT, NS), and email provider detection. Perfect for B2B prospecting, security audits, domain monitoring, and data enrichment.

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.

Audit a domain's SPF, DMARC, and DKIM email authentication DNS records for deliverability and security readiness.