I understand in general responding to him is a cheeseless tunnel but I do think that it is really important that this one time you send a very clear message to him. Not just to him but also to you. You need to practice standing up to him in a safe environment. He's been bullying you and he's worn you down a little. In an email, you can practice being firm and ignore his response.
I was in an abusive marriage before(not my current marriage)and I've had experience with this kind of behavior. I'm not saying you were abused but right now, his behavior is abusive. It took me five years after I was divorced to be able to see our M for what it was. I couldn't stand up to him and I lost alot in the D.
There is also the chance that putting it all in one email will help him see it for what it is and cause some change.
BTW- lol...BS. I didn't see that my username could be BS.