Forward mail to a smart host for specific domains

Learn how to configure an SMTP connector in Exchange to forward to a smart host.

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Beginning with Exchange 2000, an add-in is no longer necessary to support SMTP, so you don't always need to configure a connector.

However, there are times when a connector may be required when using a newer version of Exchange. For example, you may need to forward mail for a particular domain to a smart host at a defined IP address, rather than relying on DNS for mail delivery.

To configure an SMTP connector in Exchange 2000 or Exchange 2003 to forward mail to a smart host, follow these steps:

  1. In the Exchange System Manager, expand the Administrative Groups container.
  2. Expand the desired administrative group, and expand the Routing Groups container.
  3. Expand the routing group you need to work with, right-click the Connectors folder, and select New.
  4. Select SMTP Connector.
  5. On the General tab, enter a name to identify the connector.
  6. Select Forward All Mail Through This Connector To The Following Smart Hosts, and enter the IP address of the other site's mail server, enclosed in brackets (e.g., []).
  7. Under Local Bridgeheads, click Add, and select the SMTP server that will become the SMTP bridgehead for its routing group.
  8. On the Address Space tab, click Add, select SMTP, and click OK.
  9. In the E-Mail Domain box, add the name of the remote location's e-mail domain (e.g.,, and click OK.
  10. On the Advanced tab, select Outbound Security, and select the proper authentication method for your relay host. Anonymous Access is the default.
  11. Click OK three times to exit the SMTP connector configuration.
  12. Restart the Microsoft Exchange Routing Engine service and the SMTP service.