Apr 15, 2016 - 11:11 AM
I have resent your confirmation email to the email address provided in the order.
I believe the attachment is your Trenitalia official receipt, which is not needed to travel.
You are traveling on an eticket, which means the confirmation email is your ticket. You can either print it out, or show it on a smart phone or tablet, the conductor just needs to see the PNR number to validate.