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This article provides information on configuring Exchange 2000 to use a smart host IP address.
You can configure Microsoft Exchange 2000 Server to route mail for remote domains through a smart host. You can identify smart hosts by either a Fully Qualified Domain Name (FQDN) or an IP address. If you use an IP address, you must enclose it in brackets (). Exchange 2000 checks first for a server name, and then an IP address. The brackets identify the value as an IP address, so Exchange 2000 bypasses the Domain Name Server (DNS) lookup.
You can specify multiple smart hosts based on either FQDN or IP address separated by a semicolon (;). If you specify a combination of IP address and FQDN, then make sure that the smart hosts specified by IP address appear after those specified by FQDN.
ip of smarthost1; ip of smarthost2The following combination does not load balance:
fqdn of smarthost1; fqdn of smarthost2
fqdn of smarthost1; ip of smarthost2
ip of smarthost1; fqdn of smarthost2The smart host setting for SMTP virtual servers is similar to the setting configured on the SMTP connectors in Exchange 2000. Microsoft recommends configuring smart hosts on the connector, because connectors can handle message delivery on a per-domain basis.