Well, I'm coming from MS Outlook(r) and Evolution email-clients. However I've experimented several problems with both. Recently I've installed Zimbra Desktop on Ubuntu's distro and not seems bad.
Now I've a Fedora in my workstation
and I need a very good Email client solution, since I need shared calendar (better if it's installed in a web server), I need dump 6MB of MS Outlook content into the new email client and I need a faster email search. Besides, the email client will be the solution for more of twenty computers in a scheduled migration.
Zimbra Desktop is perfect and advisable by RedHat, However Zimbra Desktop cannot import MS Outlook information although it works perfectly with shared calendars (I've contacted with Zimbra support).
Thus, if anyone have a recommended solution it will be very welcome!