Linux Babe published a tutorial about installing RainLoop Webmail on Ubuntu 20.04 with Apache or Nginx.
How to Install RainLoop Webmail on Ubuntu 20.04 with Apache/Nginx
This tutorial show you how to install RainLoop Webmail on Ubuntu 20.04 with Apache or Nginx. RainLoop is a simple, modern, fast and open-source Web-based email client written in PHP.
How to Install RainLoop Webmail on Ubuntu 20.04 with Apache/Nginx