Email Validation That Protects Your Sender Reputation
ZeroHop Validator performs real-time syntax, DNS, MX, and SMTP checks to ensure you only send to valid, deliverable email addresses.
Designed to work seamlessly with Gmail, Office365, SMTP & Postfix environments.
Core Validation Capabilities
Multi-Stage Validation
Syntax, DNS, MX, SMTP handshake, catch-all detection, role-based and disposable address filtering.
Proxy & Rate Control
Optional HTTP/SOCKS proxies, smart connection reuse, and throttling to avoid provider blocks.
Bounce Intelligence
IMAP-based bounce tracking and reply monitoring to continuously refine sender health.
100% accuracy on catch-all domains
Standard SMTP validation can't tell if an email on a catch-all domain is real — the server says yes to everything. Stage 2 sends a real probe email and monitors bounces for 24 hours — the only way to know for sure.
Validation Workflow
Upload CSV/Excel files or import recipients directly from ZeroHop MTA.
Execute real-world validation using live DNS and SMTP verification logic.
Export verified emails or pass them securely to ZeroHop MTA.
Inside the Validator
One plan. Everything included.
Unlimited real port 25 validation
- Unlimited real SMTP validation on port 25
- Live syntax, DNS, and MX checks
- Catch-all and disposable domain detection
- Bounce intelligence and reply monitoring
Frequently Asked Questions
Do I need proxies?⌄
Proxies are optional. They help when validating very large lists or when providers throttle SMTP checks.
Is validation real or simulated?⌄
ZeroHop Validator performs live DNS and SMTP checks — not pattern-based guessing.
Does it integrate with ZeroHop MTA?⌄
Yes. Validated recipients can be passed directly with bounce feedback syncing automatically.
What's the port 25 RDP add-on for?⌄
Many networks and ISPs block outbound port 25 by default, which real SMTP validation depends on. The optional RDP add-on gives you a dedicated remote environment with port 25 open, available any time at extra cost.
Validate First. Protect Your Reputation.
Reduce bounces, improve deliverability, and send with confidence.