This appears to be one of the standard Vatican Easter cards printed from the original using printing technologies-----not an autopen. It was produced like any preprinted Holiday card from the original. I honestly am not capable of determining if this was penned in original ink from a digital scan---and at rare times the Pope did write such letters in his original hand(but very rarely). Its authentic if in original ink---Id suggest sending to a reputable authenticator or auction house who will be able to tell you if printed or original. I was giving u my best guess based on having seen hundreds of these---most of which were mass produced printed cards....but I dont rule out an exception.
I hope this is more helpful