SquirrelOutlook is a standards-based webmail package written in PHP4 (Squirrelmail). It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure HTML 4.0 for maximum compatibility across browsers.
This was an excellent product for 2007 but not for 2014 or beyond. If you are looking for a simple email client to use it will work. However as you start to try to really use the power of Squirrelmail plugins there is where this solution falls short. There is absolutely no support or upgrades. I spent weeks hacking and fine tuning code to get it to do work with some of the more power plugins, but it was a complete waste of time. I want a outlook looking web client to at least do the basics,like compose in HTML or rich. Password change not working group calendar not working etc.... Now after weeks of hope and praying to resolve all of the bugs with working with php 5 and chrome, I just had enough. If the developers at least offered an upgraded version that would work with all the current Squirrel plugin modules, I would not mind paying for the updated build. But that is not even an option as it is not supported. Regard, Earl