Hi John,
With the change over from the Automic to CA Community. There are some functionality changes within the profile preferences and some additional features that are available to us, as such you will have to re-follow the spaces.
For the new community we have 4 new "spaces"/places
To get email for new activities you will need to "Follow" the space itself
Or Creating Custom Streams (a new feature) if you want to follow something more specific (a place, people or tags).
In addition, within your profile preference, you can specific if you want to get an email for all activity or daily/twice a week/one a week summary
If you get a chance, take a look at this post as it give a brief intro and where to start on some of the setting.
For a full guide through the community and its features, we have a guide outline here for your .