In a high-stakes cybersecurity exercise in Boston, Emily, an ethical hacker, is tasked with tracing...

The correct answer is D. Date and time received by the originator’s email servers.

Email header tracing reveals hop-by-hop routing information, including mail servers, IP addresses, timestamps, and authentication-related details. CEH-aligned email footprinting material states that tracing an email using the header can reveal the destination address, sender’s IP address, sender’s mail server, time and date information, and authentication system information of the sender’s mail server .

The question asks for the exact moment the email was processed by the sender’s system. In an email header, this is best determined by examining the earliest relevant Received header added by the sender’s or originator’s mail infrastructure. That timestamp shows when the originator’s email server received or processed the message before forwarding it onward.

Option A. Sender’s mail server is incorrect because it identifies the system involved but does not by itself provide the processing time.

Option B. Date and time of message sent is less precise because the Date: header may be generated by the mail client and can be inaccurate or user-controlled.

Option C. Authentication system used by sender’s mail server is incorrect because SPF, DKIM, DMARC, or similar authentication details help validate sender authenticity, not the exact processing time.

Option D. Date and time received by the originator’s email servers is correct because it corresponds to the first trusted server-side timestamp in the message path.

Therefore, the best answer is D. Date and time received by the originator’s email servers.