Hello @OP, SourceForge.net no longer maintains an archive of the bitcoin-list mailing list. However, an archive of the mailing list from its early days in 2009 to mid 2013 is available on the Narkive website. You can access the Bitcoin mailing list archives on Narkive at the this IRL.
https://bitoin.narkive.com
https://bitoin.narkive.com
The narkive link does not work.
I realized that they are all already archived on in various places:
https://satoshi.nakamotoinstitute.org/posts/
I highly recommend the book of satoshi by phil champagne (it's a great overview of how bitcoin works)
I did find this interesting analysis of the early bitcoin-list posts:
https://www.resistance.money/research/library/to%20be%20organised%20better/Will%20Luther%20papers/getting_off_the_ground_the_case_of_bitcoin.pdf
