Of all things I found the following at expert.about.com, FWIW
Subject:Milan airport to train?
Please tell me how to access the train to Lugano from Milan airport.
if you intend to use the train
the only way is take the Malpensa Express Train
to Milan Cadorna Station then take a train to
Lugano from Milan Central Station.
Instead of this you can take a direct bus.
Busses to Lugano leaves from bays 19 and 22
at terminal 1 bus station.
Ask at the help desk once at the airport regarding