I don't have a Gmail address (and I don't need one). I've been invited to a discussion group hosted at Google Groups. I accepted the invitation and now I can receive and send messages to the groups. However, now I would like to change the setting in order to get only one email per day, not every possible email. Unfortunately, when I try to access the group web page I'm asked to login with a Google account.
How can I access the group's web page and change the settings without having a Google account?