A: Thanks for the query. You can use our tool to filterout the unhealthy emails such as temporary email addresses. Many user tends to use temporary emails during the SaaS app registration. Many users also do that to use the free credits with multiple accounts. Sometimes the users use invalid email by mistake. You can prevent them by using our email verification service there. However, to verify the ownership of the user to that email address, you will still need to send OTP there. We recommend you using the QUICK mode in the api as quick mode can verify most of the things really really fast (individual inbox status check is not available in quick mode). Let us know if you have any questions. Have a great day.