Please use the function of Filtri before your registration for  Multilingual Network, if you want to register with gmail.

[Crea un nuovo filtro]
1) Login gmail
2) Clic Capture d’écran 2014-04-13 à 23.37.51
3) Choose Temi
4) Clic Filtri
5) Clic Crea un nuovo filtro
6) Input in the box of Da

7) Clic Crea filtro con questa ricerca »
8) Choose Non inviare mai a Spam
9) Clic Crea filtro

Please check the figure below for your confirmation.