Domain Deliverability Checker SPF DKIM DMARC Blacklist Clay

Email Verifier & Finder - Mailbox Exists, SPF/DKIM/DMARC

apivault_labs/email-deliverability-checker

Verify if an email exists (live mailbox check: accepted/rejected/catch-all) AND find emails by name + company domain. Plus MX, SPF, DKIM, DMARC, disposable, typo and a 0-100 score. You only pay for definitive results. No login, no keys.

Supernet Domain Health - Email Reputation Audit

superlativetech/supernet-domain-health

Email authentication and deliverability audit for any domain. Checks SPF, DKIM, DMARC, MX, blacklists, SSL, WHOIS, BIMI, MTA-STS — returns a 0-100 health score with actionable fixes. Sending or receiving mode. Batch thousands or query one via instant API.

Bulk email authentication audit. Parses SPF, DMARC, and DKIM records, returns deliverability score (0-100), and step-by-step remediation actions per domain.

Bulk DNS blacklist checker for IPs and domains. Queries 30+ RBLs (Spamhaus, Barracuda, SORBS, UCEPROTECT, SpamCop). Returns reputation score, listing evidence, remediation action.

Check DNS propagation across 15 global resolvers (Google, Cloudflare, Quad9, OpenDNS, Verisign, Yandex). Detects inconsistency, reports by-region variance, returns TTL and full record data.

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 Validator

taroyamada/email-deliverability-checker

Verify email addresses using live DNS MX lookups and RFC syntax validation. Identify disposable providers and extract a 0-100 health score for any list.

Bulk SMTP Email Verifier — Mailbox & Catch-All Checker

automation-lab/smtp-email-verifier

Deep-verify lead emails with SMTP RCPT checks before campaign upload. Classify valid, invalid, catch-all, disposable, unknown, and risky mailboxes; no email is sent and no third-party verification API is required.

Bulk Email Verifier — MX, SMTP & Disposable Detection at Scale

ryanclinton/bulk-email-verifier

Verify email deliverability in bulk — MX records, live SMTP mailbox checks, disposable domain detection (55,000+ domains), role-based flagging, catch-all detection, and confidence scores. $0.005/email, no subscription.

WhoisXML is gated. Here's the RDAP-powered drop-in that works on any TLD. Unified JSON schema, RDAP-first with legacy WHOIS fallback.

🌐 DNS Lookup — Bulk A, MX, CNAME & TXT Records

nexgendata/dns-records-lookup

Bulk DNS record lookups — A, AAAA, MX, CNAME, TXT, NS, SOA, SPF, DMARC. MXToolbox & DNSChecker alternative for SREs and security teams: monitor zones, verify email auth, audit domains. Pay $0.01 per lookup, no monthly fee.