A: Thanks for the query. This is a web application (cloud app). You need to use it through a browser. This service can clean and remove invalid/temporary and similar bad emails from a provided list, which can surely reduce the bounces. However, the email bounce depends on many factors. Emails can bounce from good email addresses if the sender email do not have good reputation or not well maintained. You can upload CSV file there. You can easily save your XLSX file in CSV format and then upload it. We recommend you to register and check the service for free with the available free credits.

https://emailverifier.reoon.com/

Have a great day.