Sonicwall NAT Policy + Firewall Rules needed to forward SMTP traffic to Exchange 2007 mail server

First, you need to create 2 Address Objects. one which corresponds to the public IP of the Exchange 2007 server and one that corresponds to the private IP. For NAT policy, you have to add 2 rules that are mirror images of one another.  Go to the WAN > LAN area.  Add first NAT policy: … Read more Sonicwall NAT Policy + Firewall Rules needed to forward SMTP traffic to Exchange 2007 mail server