FAQ from MailTester.Ninja
What is MailTester.Ninja?
MailTester.Ninja is a privacy-respecting, high-performance email verification and discovery service engineered for speed, accuracy, and compliance. We go beyond basic syntax checks — validating MX records, SMTP handshakes, catch-all behavior, and threat signals like typosquatting or disposable domains. Whether you’re safeguarding sign-up forms, scrubbing CRM data, or building targeted lead lists, our platform ensures every email is not just *valid*, but *viable* — helping you protect deliverability, reduce operational waste, and grow trust with your audience.
How to use MailTester.Ninja?
It’s intentionally simple: subscribe → get instant API keys or start verifying in-browser → validate emails one-by-one or in bulk. No account creation, no email confirmation, no hidden steps. Your plan activates immediately — and your first 100 verifications are always free to test performance.