Fast, Accurate Email Verification & Deliverability Scoring
What Can You Use EmailScore For?
From scrubbing massive marketing databases to safeguarding real-time app signups, EmailScore gives you instant, calibrated email intelligence via intuitive web tools and sub-millisecond APIs.
Bulk Email List Cleaning & Deliverability
Scrub contact lists and newsletter CSVs before sending campaigns. Remove invalid syntax, dead domains (NXDOMAIN), spam traps, and disposable mailboxes to keep your bounce rate under 1% and protect sender domain reputation on Klaviyo, Mailchimp, or SendGrid.
Real-Time Signup & Form Verification
Block automated bot signups, 10-minute temporary addresses, and throwaway burners directly in your registration flow. Prevent trial credit exhaustion, fake account generation, and spam without adding annoying CAPTCHAs for real users.
Lead Hygiene & Corporate Domain Scoring
Automatically identify corporate domains versus free webmail (Gmail, Yahoo, Outlook) or burner emails. Spot salt tricks like plus-addressing ([email protected]) to accurately deduplicate leads and route qualified buyers to sales reps.
High-Throughput Transactional APIs
Integrate email scoring into high-volume checkouts, password reset workflows, and fraud engines. Engineered for high-speed execution, capable of 3,200+ checks per second with zero slow SMTP handshakes and zero IP blacklisting risk.
Two ways to use EmailScore
Check single emails and bulk lists directly in your web browser, or integrate our 0.3ms REST API into your production code.
Score, Don't Blindly Block
Legacy tools give a blunt binary pass/fail that locks out legitimate buyers whenever an SMTP probe times out. EmailScore produces a calibrated 0–100 confidence score with a soft CHALLENGE tier.
Instant Safe Delivery & Onboarding
Recognized human names, legitimate corporate domains, and verified webmail mailboxes with healthy DNS. Pass them through instantly without friction or delay.
Soft Verification (Zero Lost Users)
Ambiguous patterns, subtle subaddressing, or domain typos. Require an email confirmation link or OTP rather than dropping paying customers on the floor.
Automated Bot & Burner Drop
Score 0 (Critical Risk): Dead domains (NXDOMAIN), non-deliverable mailboxes (no MX, RFC 7505 Null MX, bogon MX), disposable mail, and RFC syntax errors.
Score 1–39 (High Risk): Machine-generated bot usernames, keyboard walks (QWERTY), and synthetic corporate identities.
Why Static 50,000-Domain Blocklists Fail
Bad actors don't just use 10minutemail anymore. They write automated bots on legitimate webmail providers and register fresh zero-day domains daily.
Webmail Bot Scripts (`*@gmail.com`)
Attackers generate random accounts on Gmail ([email protected]). Legacy tools see gmail.com and whitelist it immediately. EmailScore analyzes character distribution patterns and unnatural sequences to catch 99.11% of automated webmail bots.
Zero-Day Burner Domains ($0.99)
Fresh domains (svc-drop-812.xyz) registered hours ago are missing from static blocklists. Our domain intelligence tracks registration age in real time and flags synthetic disposable patterns to catch zero-day throwaway domains.
Multi-Accounting & Trial Churn
Bad actors abuse plus-addressing ([email protected]) and Gmail dot-stuffing ([email protected]) to repeatedly exhaust free tiers and API quotas. EmailScore strips salts and fingerprints identities.
Verify in 0.3ms.
Not 3 Seconds.
Slow email validation freezes your registration button and slows down bulk CSV jobs. Legacy APIs send synchronous SMTP handshakes (RCPT TO) taking 1.5 to 4 seconds, frequently triggering mail server throttling.
EmailScore evaluates address syntax, disposable burners, and bot patterns in 300 microseconds with zero blocking mail server delays.
100% Stateless. We Never Store Emails. Ever.
Many email verification vendors store customer lookups or build shadow identity graphs. EmailScore scores the email and immediately purges the data. Zero customer data stored, zero tracking, zero security liability.
Want to inspect the 100,000-email benchmark dataset?
Explore the exact empirical confusion matrix, category-by-category accuracy rates, and speed comparisons against legacy providers.