I just wanted to publicly thank Admins for all their hard work to fix this issue. It was a big frustration for me to not get my subscription emails for so long, but the admins have been emailing me regularly over the past couple of weeks with updates about what they were trying to see if "this" or "that" would make a difference. I was so excited and relieved this morning to see that thread emails are once again arriving in my email box!
Admins - THANK YOU! I really appreciate that you stuck with this until it was resolved and all of the updates I received from the admins along the way were appreciated.