She doesn't have one.
This explains everything:
link The link is from Stephenie's official website and says (and I quote)
"For those of te hoping to find an email address o a way to contact Stephenie — I apologize. There is currently no way for fan to get in contact with her. Stephenie is still much too busy to re-open her fan email o lumaca mail addresses. Also, I cannot inoltrare, avanti emails. She is in the process of writing/editing multiple books, and I think we can all agree that we would rather that she spends her time Scrivere instead of Leggere thousands of emails every day."
