Hi Hell,
This is an almost daily occurance in life now, too.
Nearly Exh actually wanted me to agree with some things lately that are parenting related, like "equal say" and such. I'm not agreeing to a darn thing without my lawyer also agreeing!
If your Wh's name is on the property you moved from, it may be sparking some control issues for him, I know we have that here and some friends do, too, with a WH for a spouse who was ordered to continue paying.
We become the easy target in their lives to blame the unhappiness on or things they feel are wrong. They don't have to blame themselves, and especially when it comes to kids, can have someone else to put that on.
I worked for a long while as you do, trying to still help his relationship with our child, but I'm stepping aside now. He fired me from that role when he fired me as his wife and if he is going to blow it with her, too, then he is on his own. It sounds like cold parenting on my part, but he's just too hard for me to deal with. I concentrate on our child instead and my work/relationship with her.
If he disappoints her, I merely say, "I'm sorry", and give her affection and support til she is sunny again, but I say nothing about him. It's terribly hard, but I remember the end result and it helps.
The high road is an attainable goal, though not easy to stay on. Besides my own dreams, I've given up dreams of how I want her and her father to be and I know that she is smart and strong and realizes that he has changed.
Maybe you could just tell him that "email is better for now" and if that doesn't work, telling nearly Exh it's a request of my lawyer, eventually helps.
We have occassions coming too, many in the fall to go through to plan and sort. It takes a lot of energy, but I am going to concentrate on my part of the planning and if he presents himself, we will work around it. I did not want to do split occassions for a few years because of so much change and don't know if he will be agreeable, but I also try to remember...it's not about us.
I'm sorry for your hard times.