Smart hosting is the process of redirecting the delivery of email through a secondary mail server. This is common when users have an outside email service, for example, an offsite Microsoft Exchange server, that they prefer all their mail to come from.

Launch IIS manager from the icon on the desktop or by the command line to Start -> Run -> inetmgr.
In IIS Manager, drill down to the Default SMTP server, right-click and choose Properties.
Note: On Window 2008 this must be accessed via the IIS 6 compatible IIS Manager, which is found at Start -> Programs -> Administrative Tools -> Internet Information Services (IIS) 6.0 Manager

1) Click the Delivery tab.
2) Click on Advanced.
3) Provide the IP or DNS name for the mail server to use. If using an IP, it should be in brackets: [186.22.245.98]
Note: If account information needs to be passed to the smart hosted server, click on the Outbound Security tab and use Basic Authentication.