I am running Ubuntu 12.04, soon to be 14.04, following the how to for the perfect server tutorial found on this site with the Apache2 web server. I am wanting to try out a few other webmail clients on my 14.04 install before it actually takes over for my 12.04 server, however, I have already followed the tutorial and installed the squirrelmail client before I decided I wanted to experiment with a few other clients. My question is this: how do I remove squirrelmail and install a replacement without having to start from scratch after following the tutorial? I do not have ISP3 installed and do not plan to since the server is my own web/email server for my own small site and feel ISP3 is really of no use as I have done nothing whatsoever with it for over 2 years since I followed the 12.04 Ubuntu tutorial on this site. Specifically, I am wanting to give Rainloop a try and do not want to have to redo my installation. Any advice would be appreciated as I have had little luck finding what I am looking for online.