SPF, DKIM and DMARC Checker (Email Authentication)

Email Data Breach Checker

lofomachines/email-breach-checker

Check if your email has been compromised in a data breach. Scan one or hundreds of emails in bulk to find leaked passwords, exposed accounts, and stolen credentials. Get a full risk score, breach history, and affected sites — fast, accurate, and affordable.

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.

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.

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.

Monitoring Checker Duplication

apify/monitoring-checker-duplication

The Monitoring checker duplication is a part of the Apify Monitoring Suite (apify/monitoring). See its readme for more information and how to use this.

Email Validation API - Bulk Email Checker & Verifier

pink_comic/email-validation-checker

Bulk email verification and validation API for lead lists. Check syntax, MX records, disposable/free domains, role accounts, catch-all behavior, and optional SMTP signals. Clean CRM lists and assess email risk without an API key. Results do not guarantee mailbox ownership, reachability, or delivery.

Email Verifier — Bulk Validation, Catch-All & Bounce Removal

logical_vivacity/email-verifier

The email verifier that admits what it cannot know. Catches syntax errors, dead domains, disposables, role accounts and catch-alls — and flags Microsoft 365, Proton and gateway domains as unverifiable instead of calling them valid. Returns SPF, DMARC, MX provider and a 0-100 score.

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

Email Verifier & Validator — Bulk List Cleaning, No API Key

thirdwatch/email-verifier

Check that each mailbox exists before you send. Catch-all, disposable, role and free-provider detection, optional SPF/DKIM/DMARC, and a clear good/risky/bad verdict with a 0–100 score. Clean Apollo, LinkedIn or CRM lists and cut bounces. No email is sent.

Email Verifier & Validator

technicaldost/email-verifier

Bulk-verify email deliverability: syntax, MX records, disposable/role/free-provider detection, and a 0-100 deliverability score. Clean your lead lists before you send.