IMSS
                  uses the internal addresses to determine whether a policy or an event is inbound or
                  outbound. 
               
 
               
               
                  - 
                     
                     
If you are configuring a rule for outgoing messages, the
                        internal address list applies to the senders.
                     
                     
                   
                  - 
                     
                     
If you are configuring a rule for incoming messages, the
                        internal address list applies to the recipients.