What information can be viewed in the Rejected Details section for administrators?

In the Rejected Details section, administrators can view detailed information about emails that have been rejected by the system. This includes insight into the reasons for rejection, which is crucial for diagnosing issues with email deliverability and understanding sender patterns. Among the available options, message content stands out as the correct answer because it directly relates to the specifics of what was rejected—not just the metadata surrounding the message. By examining the content, administrators can identify problematic elements that may have triggered the rejection, such as potential spam characteristics, policy violations, or malware.

The relevance of examining message content helps in making informed decisions on configuring settings to improve email filtering criteria, enhancing overall security and efficiency in email management. This focus on content allows administrators to take necessary actions, whether adjusting filtering rules or communicating with senders about best practices for future email communications.

While the other options provide useful metrics and information, such as mail flow statistics, sender IP addresses, and delivery timestamps, they do not offer the same level of insight into the specific reasons for rejection that the message content does. This makes the ability to review message content a critical component of email security and management strategies.