Mailing List Management
The GnuCash mailing lists are served by a mailman server which allows users to subscribe, unsubsubscribe, and otherwise manage their subscriptions to the various lists available. If you want to subscribe to specific lists you can try:
Mailing List Archives
You can also jump to specific archives for some of the lists:
For other lists, you can go to the mailman server and select the list you want to see.
Searching the List Archives
We also provide a mechanism to search the mailing list archives. You should really search the archives before asking a question. Alternatively, you can use the term 'site:lists.gnucash.org' to google to search within the archives, e.g. http://www.google.com/search?q=site%3Alists.gnucash.org+encrypt+the+file .
You should also look in the FAQ to see if your question has been asked and answered before.