From Hydrogenaudio Knowledgebase
This article is about the Preferences page. For details on the component, see foobar2000:Components/Freedb Tagger (foo_freedb2).
Pages marked * are added via third-party components.
Enter your email address. If you aren’t registered with freedb, any address of the form firstname.lastname@example.org will do.
Allows you to select which freedb server to use. Click “Retrieve...” to get a new freedb server address if the current server is not responding.