There is no contact info in your profile... I'm interested in the email idea, check out https://github.com/alain94040/coolbox for my own list of ideas regarding email.
I'm looking over your stuff and I like where your ideas are headed. You cover a lot of topics in your write up on Github. My thinking has been towards a much smaller feature set, specifically one that would help the most busy people who need the product most. After this has been achieved with a solid market share of the target market, then we begin adding additional features.
One of the major hurtles, is that email is intrinsically different for everyone. A great email solution is one accepts this natural hurtle and uses it to create an economic moat against the inevitable competition.
While I am not an expert in email or programming for email software, I have developed a feature set and interface that I believe would solve these email issues.
This project is important to me, because I think it would not only improve my life and productivity, but the lives of many others who are enslaved by emails.
B) An email sorting tool. Assigning importance scores to emails and then having the email predict where you want incoming emails to be in your list (higher scores = near the top)
C) A tool for entering your course list, and having the page find all of the cheapest markets to buy your books from. Then transacting the total deal from one webpage.
Message me if you want me to discuss further any of these ideas. These are rather simple ideas that could make a good side project. If we actually get something done, I have much bigger projects.