How to Start Thunderbird
Unix/Linux
Thunderbird can be found under the GNOME menu. Select GNOME button (the foot icon) > Internet > Thunderbird Email .
Or move the mouse into an xterm window, type thunderbird & and press Enter.
Windows
The thunderbird icon should be on the desktop. It should be preconfigured for use.
Mac/OSX
Thunderbird is found in the Applications Folder.
MacosX -> Applications -> Thunderbird