My overall point is that it is hard to understand (like my title says) why I can get dozens and dozens of 2d scroll games and email is almost non existent. That to me is hard to understand.
Most likely because it's a lot easier to port/create 2D scroller games than it is to create a good email client.
It looks like the development of SimpleMail has become rather fragmented. The main repository on sourceforge has seen little activity if any for over a year. Then there's the MOS fork, which I'm pleased to see has been discontinued and will be merged back into the main project. Finally, there's a more active copy here:
https://github.com/sba1/simplemail/Hopefully they'll clean this up, and make it clear which repository should be used.
Given that the github repo appears to be the most active one now, I suggest that you submit bug reports there. You will have to be specific though; "it doesn't work" isn't good enough.
Hans