multiple sites and multiple email address problem

I have multiple sites which each have different support email addresses which today feed different support software which sweeps into different queues which each site monitors for inbound requests. how can the same be accomplished with ServiceDesk Plus? I can only find one master email address which users send requests to.

I'd like to have the following:
UKhelp@domain.com feed into Service Desk Plus and route to Site UK with UK techs assigned to this location
Americahelp@domain.com feed into Service Desk Plus and route to Site America with America techs assigned to this location
ASIAHelp@domain.com feed into Service Desk Plus and route to Site ASIA with ASIA techs assigned to this location

How can this be done?

JD