Hub Transport Role
The Hub Transport role is responsible for all email flow in Exchange 2010. All email flows through this role, whether internal mailbox to mailbox, to public folders, to or from external recipients.
Hub Transport Role
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Mutual TLS
Setup your Send and Receive Connectors to use TLS with specific domains. Filter Email for Unknown Users
Secure your Distribution Lists
You should secure your groups to ensure that they do not get abused. This page shows how you can make a small change to all of your groups which stops the abuse.Receive Connector
Send Connector
Two Sites, One Domain
Using the same domain with two completely separate Exchange installations