We have 5 costumers that filter their e-mails in our IronPort.
Everything is OK, Ironport and senderbase are beautiful!
But we are having some problems with bandwidth control.
Today the MX of their domain is the same ip address of IronPort, and we are only able to control bandwidth by IP address.
The solution that we used is a shared bandwidth limitation for this propose.
But we and the costumer don't like very much of that.
So we are looking for a way to force IronPort use different sources for each domain.
With that I can control the bandwith based on IP address.
Another, and better, solution would be something like VRF on routers world, or Context in ASA world.
Something like a virtual mini-ironport to each costumer.
Each one with their on Vlan, their on default gateway, rules and every thing else.
Any suggestion?