DMARC, SPF & DKIM Validator

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

Validate email security DNS records for any domain: DMARC, SPF, DKIM. Outputs structured validation results. Pay-per-event.

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.

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.

MX Lookup — Email DNS, SPF, DKIM & DMARC

junipr/mx-lookup

Check MX, SPF, DKIM, DMARC, TXT, CAA, and email DNS records in bulk with validation findings and deliverability diagnostics.

DMARC Report Analyzer — Email Security & SPF/DKIM

perryay/dmarc-report-analyzer

Parse and analyze DMARC forensic and aggregate reports. Get SPF/DKIM alignment, identify spoofing attempts, and monitor email authentication health.

Audit any domain's email authentication (MX, SPF, DMARC, BIMI, DKIM) and get a deliverability score with actionable issues.

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.

Checks SPF, DKIM, DMARC, and MX DNS records for any domain to flag email deliverability and spoofing-protection gaps. Fast, no browser needed. Need every check? See Full Site Health Suite for all 9 checks in one job.