Ever heard of ZeroBounce, Debounce, or NeverBounce?
Those are an example of Email Validation Services. It is a SAAS-based business Model where users pay a monthly subscription or buy credits to validate emails.
So, why don’t you build something similar? I can teach how to do that starting from scratch and passing by all the technical details—and sharing with you three different Methods of building this Service!
Check the full guide: https://learnwithhasan.com/build-email-validation-service-business/