Begin the process by opening the Exchange Management Console, and navigating through the console tree to Organization Configuration | Hub Transport. Next, click to the New Send Connector link that's found in the Actions pane. Launch the New SMTP Send Connector wizard.
Enter a name for the new Send connector. It is recommended using something descriptive that conveys that the send connector will be used to send SMTP mail Mailprotector outbound spam scanning servers.
This screen also contains an option that you can use to specify the intended use for the send connector that you're creating. Since our goal is to be able to send SMTP mail to the outside world, choose the custom option from the drop down list. The option chosen as shown in Figure A.
Click Next, and you will be taken to a screen that asks you to specify the address space to which the connector will route mail. Since our goal is to send SMTP mail to the Internet, we will use an asterisks in place of an address space. This tells Exchange to send any outbound SMTP mail through this connector (assuming that it isn’t destined for a recipient within the Exchange organization).
To add the address space, click the Add button, and then enter an asterisk into the Address field on the resulting dialog box, as shown in Figure B. Leave the cost at its default value of 1, and click OK.
Click Next, and you will see a screen asking you if you want to use DNS MX records to route the outbound SMTP mail automatically, or if you would prefer to route mail through a smart host. You will want to use a Smart host to route outbound email through Mailprotector. The smart host address is <yourdomain.com>.outbound.emailservice.io.
Click Next, and you will be taken to the screen that is shown in Figure C. As you can see in the figure, Exchange must bind the send connector to a specific hub transport server in your Exchange organization. By default, Exchange chooses the server that you are creating the connector on, but you do have the option of specifying a different hub transport server.
Once you have verified that the correct hub transport server is listed, click Next, followed by New. When you do, your new send connector should be displayed within the Exchange Management Console, as shown in Figure D. You are now configured to relay outbound email through Mailprotector.
In addition to adding the send connector, you will want to enter or modify your SPF records to allow your domain to send from Mailprotector ranges. Click here for more information.