This parts work can become baffling, eh? Can you let your child part compose the email, but then advise that part that the email cannot be sent until the adult part can come out and review it? I do think it's important to let your child part express itself, and for your T to hear what it has to say so you can help unburden this part. Maybe then you could preface your email with, "my child part wrote this earlier today." This way you can let the child part email just be. Walk away and then go back to it later so the other parts don't have to spend so much time trying to tear it apart.