Comment 5 for bug 292585

I've found a workaround for this one. First off, the sounds setting in System->Preferences->Sound for New Email Notification does nothing. I don't know why. However, if you go into Evolution and go to Edit->Plugins and find the Mail Notification Plugin, you can change its configuration. From there, select a .wav file and it should work - it did for me on Intrepid Ibex.

-Eli Ribble