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 toi hoping to find an email address ou a way to contact Stephenie — I apologize. There is currently no way for fans to get in contact with her. Stephenie is still much too busy to re-open her fan email ou escargot mail addresses. Also, I cannot vers l'avant, vers l’avant 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 écriture instead of lire thousands of emails every day."
