Other Mail Configuration Issues

In addition to specifying SunScreen SMTP proxy policy, configuration steps must be taken to cause SMTP-based email to arrive at the proxy for delivery to the servers it is to represent. The typical mechanism is to create MX records in the Domain Name System (DNS) for those servers. The procedure for altering DNS configuration is outside the scope of this document, but should be very familiar to your DNS administrator.

More than one Screen can be configured to operate in parallel to service incoming mail. The centralized management group feature of SunScreen makes doing so a relatively straightforward task. These parallel Screens can then be used within MX records.

By configuring the SMTP proxy on a Screen, the actual SMTP (inbound email) service into that system becomes unavailable. (You can still send email out of the Screen, as necessary.)