How Todo Email in C# Web API

I made this https://github.com/UmbrellaCrow612/PoliceCaseManagement/tree/master/src/infra/Email.Service and it does send emails if I use my Gmail app password and stuff but I wanted to know is this how companies do it as well and how can I scale it up etc ?

GitHub

Hub and Spoke pattern for PCMS. Contribute to UmbrellaCrow612/PoliceCaseManagement development by creating an account on GitHub.