MailTester Ninja
MailTester.Ninja is a free and easy-to-use email checker that verifies or finds any address.
What it does
MailTester Ninja is an email verification and finder tool that validates addresses in real time — syntax, domain and deliverability — and helps find valid professional emails for outreach. Verified emails are never stored, keeping the service GDPR-compliant.
How to use: Enter an email address in the checker to get instant validation with confidence scores, or use the finder for lead generation; connect via the REST API for bulk workflows.
Core features
Real-time email verification
Email finder for lead generation
Anti-spam and deliverability analysis
Syntax and domain validation
RESTful API
Analytics dashboard
Toolspool rankingby monthly traffic