If you want to use TLS, encrypted communication between the server and client, you will be very frustrated with Linux options.  Evolution will not recognize port 993 or 995 which are used with TLS.  Thunderbird is supposed to work, but I could never get it to connect correctly.  An excellent option is Zimbra Desktop.  You can download Zimbra Desktop from HERE

If you choose to install in Linux you will need to execute the command to install for each user.

sh zdesktop_0_90_build_1278_linux_i686.sh

This will execute the script and it will begin installation.

Be sure to set up a Desktop icon so it is easy to start.

One nice feature is you can add a number of web clients and combine them all into the desktop.  In other words, you can manage all of your email accounts into one.

If you want to set up TLS select IMAP and port 993 to connect securely to your mail server.