XP-mixed itinerary and baggage
 

I am flying JFK-FCO-VCE. All Alitalia - first leg is in business, second leg is coach. Then the return is FCO-LHR-JFK, Alitalia and Virgin, again first leg is in Business, second leg in Economy. For checked bags, do I get the Business class allowances for all legs as the first leg for each is booked in Business? (Used DL rewards to book, that's why I put this here.).

I have no status at this point with Delta or the partners.

Thanks!!!