Replace Roundcube with Rainloop

Hello,

I am seeking clear instructions on how to install RainLoop and completely replace Roundcube as the webmail client in my setup. I have conducted some research and found several posts from 2016, but none provide definitive guidance.

Could someone please provide a straightforward overview of the installation process for RainLoop? Additionally, I would appreciate guidance on how to remove Roundcube and configure RainLoop as the default webmail client, including setting up the webmail subdomain to direct to RainLoop.

Thank you for your assistance.