|Deutsche Übersetzung dieses Artikels: Thunderbird|
Edit → Account Settings...
New Account Setup
Newsgroup account → Next
news.albasani.net is the usual setting. See SSL and alternative ports for other possibilities.
The account name can be chosen freely, the server name is only a suggestion.
The line "Outgoing User Name" has no meaning. Thunderbird builds that value out of the email address. It is never used, though.
Subscribe News Groups
In the "All Folders" lists you should now have an entry for the news server. Select it, then chose menu item File → Subscribe...
Thunderbird then sets up a connection to the server and tries to log in.
Fill in the value of "Username:" from the email reply of your account registration.