Step by step process to decommission a shared SMTP namespace in an Exchange Server organization.
How to use Log Parser to analyze Exchange Server protocol logs to determine send connector usage.
How to configure outbound mail flow for Exchange Server 2013 using Send Connectors.
A common misconception is that outbound email can be load-balanced for Exchange simply by provisioning two equal cost Send Connectors, either using DNS to route directly or routing via a smart host for each Send Connector.
In some situations it is necessary to share an email domain between two distinct email systems. Exchange Server handles this easily using Shared SMTP Namespace.