To subscribe or unsubscribe from a newsgroup:
Click Accounts > Account Options.
Click the News tab, click an account, and then click Newsgroups.
Click a newsgroup.
or
Type a search term, click Search, click a newsgroup, and then click Subscribe.
(Optional) To unsubscribe to a newsgroup, repeat Step 1 and Step 2, click the Subscribed tab, click a newsgroup, click Unsubscribe, and then click Yes.