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Cargo Transportation Services: The Cargo Transportation Services is found in the Edge Cargo Transportation Services and Hub Cargo Transportation Services roles, and has fundamental importance in the message security, regulation and hygienic process of Exchange Server 2007. The Exchange Server 2007 Cargo Transportation Services architecture allows all the flow of messages that pass through the Cargo Transportation Services pipeline to be processed by Cargo Transportation Services. The Cargo Transportation Services uses APIs that are available to vendors and the same APIs were used by Microsoft to deliver the standard Cargo Transportation Services which comes with Exchange 2007 While Exchange Server 2003 used to have SMTP Event sinks, this functionality is no longer available in Exchange Server 2007. Exchange Server 2007 has a completely new SMTP protocol and Cargo Transportation Services stack. Instead, in Exchange Server 2007 we useCargo Transportation Services. When a message arrives in an Exchange Server organization, it is moved through the Cargo Transportation Services pipeline SMTP (Figure 01) and each SMTP Event may have Cargo Transportation Services that access the messages during this process and may perform some actions. The Cargo Transportation Services are used within Exchange Cargo Transportation Services Service and the only two roles where this service is available are Edge Cargo Transportation Services and Hub Cargo Transportation Services roles. We are going to summarize all the built-in Cargo Transportation Services role by role, its priority and the SMTP Events associated an each Cargo Transportation Services. These standard Cargo Transportation Services were developed using the same APIs that can be used by 3rd party vendors. We can get a good example of the usefulness of Cargo Transportation Services when we have a single machine containing the three roles (Mailbox, Hub Cargo Transportation Services and Client Access) and that machine is responsible for all the Internet message traffic. In this case, the Cargo Transportation Services are responsible for the clean-up process (such as Anti-spam, content filter and so on). They are very useful in the Hub Cargo Transportation Services role. Although the Hub Cargo Transportation Services role has only two Cargo Transportation Services by default, we can use the script Install-AntiSpamAgents.ps1 which allows us to install some Anti-Spam Cargo Transportation Services, such as Connection Filtering, Content Filter agent, Sender ID agent, Sender Filter agent, Recipient Filter agent, and Protocol Analysis. By default, they are found only on the Edge Cargo Transportation Services Role. To install anti-spam Cargo Transportation Services in the Hub Cargo Transportation Services role, we must follow these steps:
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