Personally I think the note you received is misleading.
Your departure station is a small station and does not have a ticket window that can print your ticket.
For starters Malpensa is not a small station. Moreover there is a ticket office that is manned during normal office hours. You should therefore have no problem in picking up your tickets there (if the whole CP code story turns out to be true) provided you arrive during office hours.
Having said this, if you want to be extra safe, you can ask for a refund and ditch the whole italiarail service altogether. Paperless tickets for the Malpensa express can be booked online easily on the official site, or can be purchased at automatic ticket machines which are conveniently placed next to the luggage collection conveyor belts so that you do it as you wait for your luggage. You’ll also find ticket machines before reaching the train platform at Malpensa.
Tickets for national railway services can be purchased on the Trenitalia website. Normally these come in the form of a paperless booking identified by a PNR code which is your ticket. The ticket officer checking your ticket will ask solely for the PNR. Nevertheless should you need to print paper tickets, you should have no problem doing so at Milano Centrale station, which is the biggest station in Milan and is this served by manned offices as well as self service machines. Just make sure you have enough transfer time between your trains to allow for these bureaucratic operations.
Credit:stackoverflow.com‘