Hi DDHarris,
Welcome to the forums.
Windows mail can be used for other newsgroup servers. You need the server address and access. If you do a google for 'newsgroups', you'll find many. Unfortunately many charge for use. Many software programs have devoted newsgroups. For instance news.mozilla.org.
Obviously for all things mozilla. To set up an account, in WM, Tools/Accounts. Click on add, select 'newsgroup account' NEXT. Name you want posted 'next'. Email address (not sure if this can be left blank, but it isn't wise to display your real address unless you love spam). Next. In 'News NNTP server' type (cut/paste) 'news.mozilla.org' (no quotes). Next and Finish. Should get a window saying your not subscribed to any lists and offer to download a list for you to choose from.
Hope this is useful info.
Gary