Free Real-Time Email Checker & Verifier
Check Any Email Address Instantly.
Inspect MX records, detect 40M+ disposable burner domains, correct common typos, and evaluate deliverability in sub-50ms.
LIVE VALIDATION ENGINE (EDGE NODE)
❯ Enter an email address above to test real-time validation and disposable detection.
Integrate in Your Codebase
curl -X POST "https://fadsync-email-validation.p.rapidapi.com/v1/check" \
-H "Content-Type: application/json" \
-H "X-RapidAPI-Key: YOUR_API_KEY" \
-H "X-RapidAPI-Host: fadsync-email-validation.p.rapidapi.com" \
-d '{"email": "user@example.com"}'Detection Architecture
How the MailCheck Verification Engine Works
Every validation executes four comprehensive verification layers in sub-50ms:
1. RFC Syntax & Typo
Evaluates RFC 5322 compliance and corrects misspellings (e.g. suggesting @gmail.com for @gmai.com).
2. 40M+ Zero-Day Blocklist
Matches the domain against an automated 24/7 crawler database tracking newly spawned burner domains.
3. Live MX & DNS Query
Performs synchronous DNS lookups to verify active mail exchange servers and detect catch-all policies.
4. Zero-Retention RAM
Guaranteed 100% in-memory processing. We never store or log user emails, keeping your user data private.
Got Questions?
Email Checker FAQs
Common questions about disposable email detection, MX lookups, and API integration.