Now that User Group communications are all in Community, it is important you adjust your email preferences within the Community to fit your needs. When you join a user group by following that group you are subscribed to all the activity and communications that goes on within that group.
1. Click your profile drop down in the global navigation, and select preferences:
2. Here, you can choose to receive email for different actions. To receive user group announcements (invitations) in your email inbox (not JUST your Community inbox) select:
Since you have checked yes to receiving notifications, now you specify which notifications you want in your inbox. I have checked yes to content that I have created or participated in, and social actions so I am notified if someone is trying to reach out to me. I suggest you select 'all activity' so you receive these notifications in real time. Otherwise you could miss a meeting!
If you want to receive notifications in your inbox of the activity of all of the people you are following, select email next to 'following' at the bottom. You can also indicate if you want to receive all activity, or just a daily, weekly digest.