Bulk Domain Email Security Checker

DMARC & Email Security Checker

taroyamada/dns-dmarc-security-checker

Validate domain infrastructure in bulk to boost email deliverability. Extract DMARC policies, SPF records, and MX configurations to keep outreach out of spam.

DNS Lookup

automation-lab/dns-lookup

DNS Lookup resolves all standard DNS record types for one or more domains. It returns structured data including IP addresses, mail servers, name servers, TXT records, and an email security analysis that checks for SPF and DMARC configuration.

Complete website & domain audit in one run: SSL/TLS, DNS, SPF/DKIM/DMARC email security, security headers, tech stack, WHOIS, blacklist & uptime — with a health score and fix list. No API key.

🌐 DNS Propagation Checker

taroyamada/dns-propagation-checker

Query up to 200 domains across 8 global resolvers to extract A, NS, and SOA records and audit worldwide nameserver propagation instantly.

Domain Security & Email Deliverability — DNS, SPF, DMARC, DKIM

ryanclinton/dns-record-lookup

Audit a domain portfolio for email spoofing, broken SPF, DMARC enforcement, DNSSEC and shadow-SaaS senders. Returns a posture score, what to fix first, vendor dependencies and drift alerts — not just records. Bulk DNS / SPF / DMARC / DKIM lookup, no API keys.

DMARC Checker

onescales/dmarc-checker

Simple DMARC record lookup tool. Check email security configuration for multiple domains in a single run.

Bulk-check domains for email setup & authentication over DNS: MX + provider, SPF, DMARC policy, DKIM selectors, with a deliverability score. One JSON row per domain.

SSL Certificate Checker

automation-lab/ssl-certificate-checker

SSL Certificate Checker connects to domains over TLS and inspects their SSL certificates. It returns structured data about certificate validity, expiry, issuer chain, TLS protocol version, cipher suite, and a security grade from A+ to F.

DMARC, SPF & DKIM Validator

andok/dmarc-spf-dkim-validator

Validate email authentication DNS records to prevent spoofing and ensure high email deliverability for your domains.

Email Domain Blacklist Checker

trovevault/email-domain-blacklist-checker

Check any domain against 15 email blacklists (Spamhaus, SURBL, SpamCop, Barracuda and more) and validate SPF, DMARC and MX records. No API keys required. Export data, run via API, schedule and monitor runs, or integrate with other tools.

Bulk Email Deliverability Checker — MX, SPF, DKIM, DMARC & BIMI

logiover/bulk-email-deliverability-checker

Check email deliverability for thousands of domains in bulk. Verifies MX records, parses SPF policies, discovers DKIM selectors, parses DMARC tags and checks BIMI. Returns a detailed deliverability score per domain. No API key — ideal for cold email campaigns and email marketing audits.