I would suggest not bringing up the e-mail problem in your emails anymore. It doesn't seem to be helping your anxiety and it could be more irritating to her if you often write about it at length. I'm going to assume she doesn't know what her boundaries are or will be since she seems to be avoiding the topic. I would say cut down by yourself, but that doesn't seem to be possible on your own right now. I think it would be to everyone's benefit if you just let this go in your communications--you've already done your due diligence. If things are going to change then they will, in their own time.