Final answer:
IMD exception statuses indicate the state of message delivery attempts, while Automatic Retry is a system feature that retries sending a message after a failure. They are significant in computing or messaging systems to ensure message delivery.
Step-by-step explanation:
The subject in question appears to refer to IMD (Immediate Message Delivery) exception statuses and the feature of Automatic Retry in the context of computing or message queue systems. IMD exception statuses are notifications concerning the state of message delivery attempts, which can inform if a message has been delayed or unsuccessful due to certain issues such as network problems or system failures. When a message fails to be delivered, certain systems are equipped with an Automatic Retry mechanism. This automatically attempts to resend the message after a set period of time or under specific system conditions. This functionality is crucial in ensuring messages are eventually delivered without necessitating manual intervention, thus enhancing the reliability and efficiency of a messaging or middleware system.