Does anyone know J.K Rolling's Eメール adress?

No. I do not know her Eメール address, and I have no idea where to find it LOL. but i know there are websites where あなた can get their ファン mail addresses. But chances of her getting that are slim. Sorry :(

First off, あなた spelled the author's freaking name wrong. It's J.K. ROWLING.
But in short, no, I don't have her Eメール address and I highly doubt she would ever give it out to the public.

I think あなた could send her a snail-mail letter if あなた go to fanmail.biz it might have her address.

yeah, it's she's_not_going_to_give_it_out_to_you@hotmail.com :D