Indeed. And Sylpheed is set as the "Mail Reader" under
Preferred
Applications.
Hmmm. Under KDE I would then look to see what application is associated with
the email when it is stored as a file on your desktop (whats the file
extension by the way ?) by either right clicking on it and checking its
properties, or just 'Control Centre' -> KDE components -> File
associations.
Don't know how to do this in gnome though...
Chris