I just went through this same thing with my T. Email boundaries changed I felt hurt and abandoned and wanted to quit therapy, even though rationally I knew he was just creating healthy boundaries for us. Anyway end result almost a month later, we have recovered from our boundary change. It was hard at first but it's what I needed as well. I used to email multiple times a day, now I only email twice and he responds a lot less and that's OK. I know it hurts a lot now, but I got through it with my T and I am sure you will too. Don't lose faith it gets easier. I'm sure your at has your best interests in mind as well.