Turn off email alerts?

Agree with everyone on this--sadly we have stopped using Review for most projects because reviewers without an articulate ID are so angry about this. I work with all external clients (mostly large companies) and they get very upset about it. In many cases employees are not allowed to create an Articulate account (or an account with any software provider that is not vetted and approved) to be able to turn off notifications, for security reasons. But the HUGE problem: One of our major Fortune 500 clients blocked the emails as SPAM which is causing a major headache now because the articulate.com domain has been blocked--which means all of the rise courses we did for them are inaccessible to hundreds of learners right now. I have spent so many hours untangling this mess with my client's IT department that I'm considering going to the dark side (I immensely dislike Captivate, but this has been discussed on the community for 3 years and Articulate has not taken action...)