> your question is overly broad for this mailing list.
> It is very unlikely someone is going to take the (unpaid)
> time to evaluate your specific situation and propose a solution.
This is ONLY a test NOT for commercial application.
> Then you need another system that handles all traffic
> to/from your single fixed/static IP address on which
> you can run a "reverse proxy" and forwards traffic to
> the appropriate VMs on your VirtualBox host.
Several years ago I did following test;
One Fixed/Static IP serving multiple mail servers running on VMs. Each mail server has its own domain. I ran Perdition on a VM. It worked seamlessly. Emails were delivered to respective servers. I have posted my solution on several forums before.I doubt whether Perdition can help me out on my current test ?