This is required for both the Edge Transport and Hub Transport servers to send and
receive emails.
2. DNS: The Edge Transport servers in the perimeter network and the Hub Transport servers in
the Exchange organization must be able to locate each other by using host name resolution. You
must specify the appropriate DNS suffix for the Edge Transport server prior to its installation.
On the DNS servers that both the Edge Transport and Hub Transport servers are configured to
point to, configure host records in the appropriate forward lookup zones to resolve each server.
Alternatively, you can create host file entries on both the Edge Transport and Hub Transport
servers to resolve each other.
3. Send Connector to Edge Server: Configure a Send Connector to forward all outbound Internet
mail to the Edge Transport server for onward relay to the Internet. The address space for this
connector is typically ??? * ??? indicating that this connector will forward mails for all Internet
domains. The usage type will be internal and the authentication mechanism will be either basic
or Externally Secured. The source bridgehead server will be one or more Hub Transport servers
in the Active Directory site. In Figure 9 - 12 a Send Connector is configured to route outbound
mail to the Edge Transport server and its authentication mechanism is set to
ExternalAuthoritative .
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