Questions;

1.      1. These systems need to be in our DMZ, how can we access them to pull the logs?

2.      2. Can we configure some type of Active Directory list of valid SMTP users that are allowed emails though?

3.      3. How does the PCI Compliance portion work? In detail?

4.      4.  Some basic troubleshooting features that we can use to determine if messages are coming in, messages get dropped, or determine when a message was received?