Configuration must be done using the Exchange Control Panel.
In the EAC, go to Send mail flow connectors> Send connectors, and then click Add Add icon. The New Send Connector wizard starts.
On the first page, enter the following information:
Name: Enter a descriptive name for the Send connector, such as smart host for the Internet.
Type: Select a descriptive value. For example, Internet or Custom. For more information about Send connector usage types, see Send connector usage types.
On the next page, select Route mail via smart host, then click Add Add icon. In the Add Smart Host dialog box that appears, type the smart host that is sent to you in the service activation email.
Here is the screenshot of the Send connector configurations.
