I find it very difficult to follow your H's e-mail. He sure has a way with words! It makes me wonder if he spoke like that, too.
Anyway....His "observations" about you not fulfilling your "wifely duties" is typical MLC'r rewriting of history. My H did the same. I'm trying to talk to him about one thing, and he will suddenly say "you never showed desire, never made me feel like a man". The fact is, any time I would compliment him, tell him he was handsome, sexy, or whatever, I got "you're just saying that because you are my wife". Fact is, he just could never receive what I had to offer. I don't think he believed he was worthy. Still don't. I also pointed out to H the last time I saw him that he gave me nothing to feed that desire (I didn't add he was giving it all elsewhere). He agreed.
So, your H will rewrite history, and believe what he believes.
I would suggest leaving it alone. No response is necessary. Do not get into a position where you feel like you have to defend yourself.
Limit contact. Stay the course. Tighten your Armour of God.
