Hello! I was reading your about your project and it reminded me of a time that i created a program to get all the public information of a website with protocols like whois, and other information gathering tools, I think i could get this done quickly, and the part of getting the domains from the emails and putting the output on a CSV file sounds easy as well, i have worked with csv files several times as a freelancer, so its not a problem for me to manipulate them with python.
So send me a message if you are interested, and have a great day.