The steps below will configure MDaemon verify the domain name give in the incoming SMTP MAIL command originates from the designated IP address entered in the IP Shield settings.
As an example, the default configuration uses the $LOCALDOMAIN$ macro, which designates all the defined domains configured in MDaemon, and the private IP address range in the a local network. An incoming session stating the $LOCALDOMAIN$ in the SMTP MAIL statement must originate from the IP address range in the local network to pass through the IP Shield.Another example, without using macros or IP address ranges. Example.com is entered in the domain name field and 192.0.2.124 is entered in the IP field. If an incoming SMTP session states the sending address is firstname.lastname@example.org and the connecting IP address is 192.0.2.0, then MDaemon will reject the SMTP session. The IP Shield also has a number of options that can be configured.