Ok, first, I'm sorry friend. And I can identify with you. I, like you, want to see some spark of hope. But, it's just not there. B/c, like you said, she's gone. LONG gone.
You know the answer. DON'T send that email. NOTHING good can come from it. You know your STBXW knows where you stand and how to find you if she wants to.
Keep your dignity. She can't have that. Don't give it to her.
And, I write these words as I sit here and process my anger towards my W for doing what she is doing. I don't want her anymore. But, that doesn't mean it is painless.
Kepp your chin up. And keep moving towards your new life. I'm right behind you buddy.