We use Kaseya on our domain server (int. ip = 192.168.1.10, ext. ip = X.X.235.173, MS Server 2003) to manage Service Tickets which has the capability to send an email to the requestor when we add notes about their issue. This week our Barracuda spam filter was updated and started denying these emails because they have our domain in the From field and come from the outside ip of the domain server into our Email server (int. ip = 192.168.1.20, ext. ip = X.X.235.171, MS Server 2003 R2).
I understand I have to use the Routing Tables to route these emails from the domain server to the email server, yet I have no idea how to do that and research has not shed a lot of light on what I must do. Any help would be appreciated.