Domain Email Auth Scorecard

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.

Email DNS Change Monitor — MX, SPF & DMARC

longish_whistle/email-dns-change-monitor

Check domain lists for email DNS changes, missing MX, multiple SPF records and published DMARC policies. Get before/after evidence and CSV. No emails sent or mailbox probing.

Domain DNS & Email Security Checker

webdatatools/dns-email-security-checker

Domain DNS & Email Security Checker returns SPF, DKIM, DMARC, MX, MTA-STS, BIMI, CAA, nameservers, registrar and domain age for every domain you give it — one scored row per domain.

Email & Domain Auth Checker: MX, SPF, DKIM & DMARC

apifmcpfactory/email-domain-checker

Checks an email or domain's deliverability signals from DNS alone: MX, SPF, DKIM, DMARC, plus disposable and role-address flags. No SMTP, no mailbox ping. It reports auth-record posture, not mailbox existence. $0.005 per input checked.

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

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.

Check domains in bulk for DNS and email authentication: A, AAAA, MX, NS, TXT records plus SPF, DMARC and DKIM with policy parsing, an email security score and inferred DNS and mail provider. For deliverability audits, security assessments and B2B technology targeting.

Check public email authentication DNS readiness for domains: MX, SPF, DMARC, DKIM selectors, BIMI, MTA-STS, TLS-RPT, risk labels, stable hashes, and useful-result pricing.

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

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