The Network News Transfer Protocol (NNTP) is an application protocol that transports Usenet news articles from news servers to client applications. One such client is Thunderbird and some time ago during email discussions I learned the openSUSE forums still has a news server.
Set up openSUSE newsgroup account in Thunderbird
On the home window of Thunderbird, under 'Accounts', click on 'Newsgroups' and fill the credentials as in the image below. The email address should be
User@no-mx.forums.microfocus.com where User = your openSUSE forums username
Create Newsgroup account in Thunderbird
Click 'Next' and enter the Newsgroup server as nntp.opensuse.org. You may put the account name as 'openSUSE forums' or something that seem fit to you. Then from the home window, click 'manage newsgroup subscriptions' and select the newsgroups to which you would like to subscribe.
openSUSE newsgroups subscription
You can then read the forum posts just as you do with threaded emails and reply by clicking on the
openSUSE newsgroups in Thunderbird