SMTP: Multiple Hostnames/Interfaces Support
With the SMTP proxy able to handle mail for many domains, allow the proxy to be configured so that an admin can assign a hostname per profile, or have the proxy report different hostnames per outgoing interface. (and the ability to specify which domains/profiles go out which interface). Allows for easier management and adoption of many smtp domains on a single asg appliance.
Being able to route the packets from a different interface (IP address) is crucial too.