Cut off from receiving automatic emails from WPMUDEV

Could you figure out why all of the sudden I was cut off from receiving automatic emails from WPMUDEV.
Just about all from wpmudev community like Marketing, General questions for support and so on like forum, DOTW, etc.
It is ok; there is no need to restore leave it until I can restore this from my side as I can do with less emails right now. But I am curious about how could happen.