best Design for SMG that has 35000 mailbox

Hi All,

I need your advise, what would be the best design and setup of SMG appliance that has 35000 + mailuser

a. what SMG appliance model  to be use?

b. how many appliance that can we use? and function of its appliance.(scanner /control center)

c. what is the best design?

thanks,

jun82