You need to verify and/or change the IP address related to a host in your Symantec Messaging Gateway (SMG).
SMG 10.8 10.9
To verify the gateway IP in the Control Center:
The existing default gateway is listed here, along with any configured static routes.
To change the gateway IP:
Note: Changing the gateway IP in the Control Center is a permanent change. If you need a temporary change, try changing via the command line .