Before I received your recommendations of melon and gkrellm, I installed mail-notification, which appeared to be a good package. But every time a new message arrived, mail-notification generated an error message on the terminal screen.
I then removed mail-notification and installed gnubiff, which also appeared to be a good package. The only problem which I encountered with gnubiff is that the "when double-clicked" option does not appear to work. I set the command string to "/usr/bin/mutt", but I cannot start mutt by double-clicking on the penguin icon. Otherwise, gnubiff appears to be working properly, so I plan to stay with it. Thanks for your response. RLH
