A new feature that has recently been added to the CA Communities is option to receive an automatically generated community digest email, which provides a roll-up of all of the recent activity within the CA Communities.
The default stetting for all users is to receive the community digest on a weekly basis. However, if you find the weekly cadence overwhelming, or would like to stop receiving the community digest altogether, you can change your settings directly from your preferences page.
To access your preferences, navigate to the drop down from your global thumbnail (available on the top grey bar from any page within the CA Communities), and click on "Preferences."
Once you have reached the preferences page, the first section you will see is Email Preferences. Scroll down to the bottom of the Email Preferences section, and one of the last options will be Community Digest. From there, you can choose the frequency with which you'd like to receive the community roll-up emails, or you can turn them off altogether (see image below).
Once you've selected how often you'd like to receive the community digest, you can scroll down to the bottom of the page and click "save" to retain your new settings.
For more information on the options available from within the Preferences page, check out Preferences.