Totally agree with you @stephdl on using IMAP for accessing my mail on nethserver. But my problem is that employees get married to their email web client once they start using it. It's hard for them to adapt and change. So once I've vetted and tested various mail clients and made the right decision for our office to use xyz mail client (whatever it we choose), I'd like to be as sure as I can (I know..nothing is forever) that it will be a go forward supported solution by nethserver. I know I can install what I want, but I'd like to keep nethserver as pure as I can. And by pure I mean I don't do a lot of tweaks to it myself but use what is provided by Software Center. I hope you don't take my comments that I'm lazy and don't want to support my own. What I'm saying is that I want to make sure that the services I provide for our office on nethserver work well together and if nethserver has added a module to the Software Center this means that testing has been done to ensure some app doesn't break another part of nethserver.
I guess what I'm asking then is...
Is nethserver still looking for a mail client that they can quarterback as their go forward mail client/groupware. Because if you are then perhaps I need to wait and see which client wins this battle.
I have spun up a test nethserver and will continue to install and remove various clients to see how they all work and get familiar with each clients idiosyncrasies. But on our production nethserver I would like to be careful that what I install will not have to change in the near future.