So i'm digging around looking for the answers anyway.
The document says:
The settings tab provides access to the following::
* User accounts management
* Domain management
o SMTP delivery host management
o Authentication management
* Scanner engine configuration
Looks like "SMTP delivery host management may be what I'm looking for. But on my Baruwa user interface, I only have "Accounts" and "Scanners" options. I don't have a "Domain Management" option, however I do see there is are "Domain Name", "Owner", "Status" and "Actions" columns when I click on the "Settings" tab.
From that screen, I do not see any option buttons or text boxes to make any SMTP delivery host changes.
Making the SMTP delivery settings is a critical feature for me. Thanks for your help.