Mailtester Ninja
Free email address checker that cuts bounces before you send
Launched 2 days agomailtester.ninja
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About Mailtester Ninja
Sending to dead addresses damages a sender's reputation, so Mailtester Ninja checks lists first. Paste an address or upload a list and it tests whether each one is valid and deliverable. Checks include catch-all domain detection, role-based addresses like info@ and disposable email providers. Cleaning a list this way lowers bounce rates and protects deliverability. A free tier covers quick checks, and the service says it does not store the addresses.
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