SquirrelMail installation and configuration may seem daunting if you are not familiar with installing web applications. But by following the instructions to be discussed next, SquirrelMail can be installed without difficulty.
SquirrelMail requires both PHP and a web server that supports PHP scripts to be installed before proceeding. In our case, we will be using the Apache2 web server, although others will work as well.
First, we will go over the basic requirements, and what to do if you do not meet them. Then, we will go over some more advanced requirements that may impact on certain features within SquirrelMail.
At the time of writing, the most current stable version of SquirrelMail available is 1.4.19. The following instructions apply to this version. There are two basic requirements for a SquirrelMail installation.