What is a "Transport Queue" in Exchange Server?

A "Transport Queue" in Exchange Server serves as a crucial component in email processing. It functions as a holding area where emails are temporarily stored while they await processing and delivery to their intended recipients. When an email is sent, it goes through several stages—initially being created by the sender's client, transported by the server, and ultimately delivered to the recipient’s mailbox. During transit, various factors such as network delays or server resource availability can affect the delivery process. The Transport Queue manages these scenarios by holding emails that cannot be immediately delivered, ensuring that they are retried until they can be successfully sent.

This process is vital to maintaining reliable communication, allowing emails to not only be retried for delivery but also providing systematic monitoring and control over outbound and inbound email delivery. In contrast, the other options do not accurately represent the function of the Transport Queue: email archiving, failed delivery notifications, and encryption enhancements relate to entirely different aspects of email management and security within Exchange Server.