Follow the guide below to configure Microsoft Exchange 2016 or 2019 to use SocketLabs as the Smart Host and Internet Mail Relay.
Launch the Exchange Control Panel (ECP) with your browser and login as an administrator.
Go to Mail Flow\Send Connectors, and then click + to open the wizard.
Enter SocketLabs as the Name, select the Internet option from the Type, and click Next
Click Next
Click the + under the Address Space section to open the Add Domain dialog box.
Enter the SMTP into the Type field.
Enter an asterisk (*) into the Domain field.
Enter 1 into the Cost field.
Click Save to exit the Add Domain dialog box.
Click Next
Click the + under Source Server to open the Select a Server dialog box.
Select at least one mailbox server that you want to use to send outbound mail to SocketLabs.
Click add -> button and then OK.
Click Finish to complete and save the Send Connector configurations.