If you're using any of the traditional email clients (Outlook, Eudora, etc), you won't even notice a difference.
The big difference will be noticed when you use the web interface (using Internet Explorer). It will have a whole new look and feel.
If you'd like to get a preview of the new look and feel, we have made a Test Server available for you to try.
Use the same login information as you have in the past. The email you see in your mailbox is old mail that has come to you in the past (we took a snapshot of the current mailserver last month).
You can send mail and use the new features as you wish, but you can't receive email, since this is a test server.
For the new interface, click here.
Please note that any configuration changes you make to this test server WILL NOT be saved during the upgrade. Also, since this is upgrade is such a dramatic change from the previous version, you will need to configure your preferences after the upgrade.