It is possible to subscribe to the Genie mailing list from the interface by providing a name and valid email address in the "subscribe" dialogue box shown below.
To unsubscribe from the list at a later date simply make sure the email address is correct and "Ok" the "unsubscribe" dialogue box shown below. If you subscribed to the list via the interface then it should remember your name and email address and insert them for you. NB The name is for informational purposes only and does not need to be provided.
NB These operations will only work if the machine you are using is connected to the Internet.