Our Sunday VisitorOne used to be able to email the pope at benedictxvi@vatican.va (English) or benedettoxvi@vatican.va (Italian). However, on October 7, 2011, an official at the Pontifical Council for Social Communications confirmed for Our Sunday Visitor that the email addresses are no longer active.
Other email addresses, probably also inactive:
The (Unofficial) Pope BlogDeutsch: benediktxvi@vatican.va
English: benedictxvi@vatican.va
Português: bentoxvi@vatican.va
Español: benedictoxvi@vatican.va
Français: benoitxvi@vatican.va
Italiano: benedettoxvi@vatican.va