Routing incoming email to 2 seperate internal Exchange organisations

Quick question, can the Fortimail appliance route incoming email to two separate exchange organisations.

For example

**abc.com and xyz.com are on domain / exchange organisation / server A,

***123.com and 789.com are on domain / exchange organisation / server B

I need to make sure incoming email is routed to the correct exchange organisation.

The two exchange installations are completely independent, so can't route between the two, so have to make sure things are routed to the correct place :)