Hi Alok,
You are looking for Email with template module from the appstore https://marketplace.mendix.com/link/component/259/
The module can be then adapted for your specific requirements. More information on the module and how it works can be found here
https://academy.mendix.com/link/paths/117/Send-Emails-from-a-Mendix-App-
https://docs.mendix.com/appstore/modules/email-with-templates/
Good luck!
HI Alok,
You can use the Email with template module from the app store as mentioned by Cuvasov and in the template configuration you can change the from name.
You can use your official mail if for the configuration.