How do I authenticate with Gnus?
If you need to connect and post to an authenticated news server, you’ll need to give Gnus a password to send along to the server. To have Gnus prompt for a password, add the following to your startup file: (add-hook ‘nntp-server-opened-hook ‘nntp-send-authinfo) For more discussion and other methods of giving Gnus a password, see a discussion on the topic.