CH Email... not sure I personally would want another account (I have two, and manage two others for different websites... that's enough for me).
That could be interesting..
I use Webmin for server management... its a bit easier then strictly using the console..
http://webmin.com/GUI is a miracle in some instances...
Theres also Usermin, which could handle a web interface email (I think... not 100% sure on this. Usermin is moreover for allowing people to create and manage their own sub-sites).