Reduce Bounce Rates & Protect Sender Domain Reputation
High bounce rates trigger ESP suspensions on SendGrid, Mailchimp, and Klaviyo, while running heavy SMTP verifiers on raw lists burns thousands of dollars. EmailScore cleans contact lists at 3,200+ checks/sec, dropping invalid data before campaign deployment.
Zero Deliverability Bounces, Zero IP Greylisting
Unlike legacy SMTP scrapers that trigger spam traps, EmailScore uses safe, statistical verification that never blacklists your sending IP.
Live MX & DNS Resolution
Validates destination mail exchange (MX) topology, backup mail relays, and DNS health in real time. Isolates unroutable domains before sending.
Typo & TLD Syntax Correction
Identifies common user typos (gmial.com, outlok.com, yaho.com) and RFC 5322 compliance issues, preserving high-value leads with actionable suggestions.
High-Throughput Bulk Cleaning
Upload large CSV exports or stream bulk contacts through our /v1/bulk endpoint at over 3,200 evaluations per second without hitting rate-limit stalls.
Deliverability Triage for Clean Outbox Management
Segment your contact database with surgical precision to maximize deliverability.
Valid MX records, pristine domain reputation, correct RFC syntax, zero burner indicators. Deliverability rate >99%.
Domain configured with catch-all routing or minor configuration warnings. Route through secondary warming pools or re-verify before high-priority blasts.
Non-existent domain, dead MX records, known spam trap relay, or malformed address. Suppress immediately to prevent hard bounces.
Frequently Asked Questions
What causes email accounts to get suspended by SendGrid, Postmark, or AWS SES?
Major email service providers enforce a strict bounce rate threshold (typically 2% to 5%). If your bounce rate exceeds this threshold, automated monitoring halts sending immediately to protect shared IP reputation. EmailScore eliminates hard bounces before you hit send.
Can EmailScore clean existing contact lists via CSV?
Yes. In addition to our real-time /v1/check endpoint, EmailScore provides a high-speed /v1/bulk endpoint and dashboard CSV cleaning utility capable of processing hundreds of thousands of contacts in minutes.
Does EmailScore store my customer contact list?
No. EmailScore is 100% stateless. We process incoming emails in memory, compute diagnostic scores, and return the response without writing addresses to disk or retaining customer databases.
Protect Your Outbox Placement Today
Run your list through EmailScore's high-speed verification engine and protect your domain reputation.