To the op, look, it seems like you were in a crappy marriage and wanted out. Who wants to stay miserable forever? I hope you can let go of what happened and move on.
Ok, to comment on your question. If it were me, I'd switch halls, get reinstated, then print the emails, highlight the nasty things that were said, and have a mtg with them with copies for them and all the elders. Look them straight in their eyes and make them answer for it....
What cognac said.
First, you never know what other exchanges he may have connected to your email account between now and then. This could end up being one of just many.
Second, running to the elders now would only make them thing you're just being vengeful.
Similar to cognac, one option is to wait until you're reinstated, and when you notify them you're moving congregations, explain why, let them try to convince you not too, and then hand over printed copies to the elders, telling them you've also cc:d the C.O. Just let them all deal with it and never mention it, or dwell on it, again.