Which of the following is a benefit of employing a Secure Email Gateway?

The selection of enhanced protection against email threats as the correct answer highlights the primary function of a Secure Email Gateway. A Secure Email Gateway is designed to safeguard an organization's email system by filtering out malicious content, such as phishing attempts, malware, and spam. This protective layer effectively reduces the likelihood of successful cyberattacks that exploit email as a vector.

Employing such a gateway allows organizations to monitor incoming and outgoing emails, ensuring that they comply with security policies and preventing unauthorized access to sensitive information. By using threat detection techniques like scanning attachments, analyzing links, and applying machine learning algorithms, a Secure Email Gateway significantly strengthens an organization's overall security posture regarding email communications.

The other options, while potentially relevant to broader organizational goals, do not pertain directly to the primary security functions offered by a Secure Email Gateway. For example, while reduced bandwidth usage might be indirectly related to improving network efficiency, it is not a core benefit of a Secure Email Gateway itself. Similarly, marketing opportunities and improvements in email design pertain more to strategic communication and visual aspects of emails rather than their security and protection against threats.