Alright, I googled a little bit and found this:
http://talk.maemo.org/showthread.php?t=92303

Some more minutes later, I finished this very much untested prototype:
https://github.com/ruedigergad/Skipp...l.rpm?raw=true

Please be aware that I didn't even had the time to test that on my own device yet.
If you are brave enough, you can give it a try and see if it adds e-mail notification support.
If it is not working, please try to run SkippingStones ("harbour-skippingstones") from the command line and see if anything meaningful is emitted when an e-mail is received.