Which of the following is a primary function of an SEG?

A primary function of a Secure Email Gateway (SEG) is indeed filtering spam. SEGs are specifically designed to monitor and manage incoming and outgoing email traffic, focusing on enhancing email security and efficiency. By filtering out unwanted and potentially harmful spam emails, SEGs help to protect organizations from phishing attacks, malware, and other security threats that are commonly associated with unsolicited email.

This spam filtering process typically involves scanning email content, headers, and attachments against known spam characteristics and various heuristic analyses. The SEG utilizes predefined security policies to identify and block unwanted emails, ensuring that the user's inbox remains clean and that important communications are not overlooked due to overwhelming spam.

While enhancing transmission speed, increasing storage capacity, and managing user permissions are valuable functionalities in email systems, they do not represent the primary focus or functionality of a Secure Email Gateway, which centralizes on ensuring the safe and secure handling of email messages.