Increase your open rate: Don’t waste time, resources and efforts reaching non-existent email recipients. Average open rates increased by 23% after verifying your mailing lists.
Avoid being blacklisted: While sending to unvalid recipients you will ruin your sender reputation.
Reach new email contacts: Are you looking to find a friend’s email, reconnect with a loved one, or establish a new professional relationship?
« We went from a 7.50% bounce rate down to 0.20% And it keeps dropping. Can’t wait to see what’s next, and huge thanks to the Mail Ninja team! »
Kylian Khalifa, Founder of Taap.it
« Great tool! Checked all my emails fast and easy. Now my messages don’t bounce. Super helpful. I recommend it! »
Daria P, Great tool!
« By far the best value tool on the market, does exactly what you want it to, for a very fair price! Now an integral part of my cold outreach stack. »
Dan Reeves, This is solid!
« Great tool! The health of your email list can make your break your marketing efforts. »
Bea Vladut, I really appreciate
« Absolutely crazy game changer, had issues before with other mail validators, either being too expensive, or just not being good enough. »
Noumair Rafiq, Really impressed
Mail Tester Flexibility
You can purchase and distribute several keys using different emails while subscribing. Your key is enabled as long as your subscription is enabled.
You can select a plan quantity while purchasing to leverage your rate limits: Ultimate Plan x 5 = 1M emails checked per day.
You can instantly cancel your subscription at anytime from the « My Account » menu.
We’re here to ensure a seamless experience for our users, whether you’re joining us or moving on.
For our API users: Please refer to our API guide to maintain a proper query rate.
Frequently asked questions
What happens when I reach my daily limit?
Requests above your plan limit are refused with a clear message, nothing is queued or lost, and your quota resets the next day. Need more volume? Pick a plan quantity above 1 at checkout: Ultimate Plan x 5 = 1M emails checked per day.
Do you store the emails I verify?
No. We return the result and keep no copy of the addresses you submit or of your lists. That is the whole point of MailTester Ninja: unlimited verification with no data left behind.
How does the key work?
Right after checkout you receive your key by email. Use it in the web verifier, the bulk app or the API. It stays active as long as your subscription is, and you can cancel any time from the My Account menu.