Introduction Introduction. MailTester.Ninja is a free and easy-to-use email checker that verifies or finds any address. Related AI tools ProofUp 03/07/2024 000 AI Analytics Assistant MarketingBlocks 10/06/2024 000 AI Ad Creative Assistant Outpost 02/11/2024 000 AI Analytics Assistant Devzery 22/07/2024 000 AI Advertising Assistant Caboodle AI 11/07/2024 000 AI Ad Creative Assistant Nooks | AI Powered Parallel Dialer and Virtual Salesfloor 03/09/2024 000 AI CRM Assistant