This is a setting I discovered for helping me navigate through the postings.
First, it's important to know that the "Communications" is everything possible (posts, messages, etc.) on this site that has a "direct link" to the MRI member's username. For example, if I create a post, I am linked to the post until I stop following the post. If I reply to a post, I am linked and will continue to see any activity within the post as I was "linked" via my reply until I stop following the post. NOTE that if you have all e-mail notifications turned "on" the list in this communications site are the items that will be e-mailed to you.
There are some communications that cannot be turned off. From an earlier post:
Here's what it causing all the communications:
The items that you can control are 1 thru 3 by shutting off the "Follows." 4 through 7, you are at the mercy of the MRI.