What can reduce the spread of malware attachments on Edge Transport or Hub Transport servers?

The attachment filtering agent is specifically designed to identify and manage email attachments that may pose a security risk, such as malware. By implementing attachment filtering, organizations can block or quarantine emails with suspicious file types or excessive attachment sizes before they reach the mailbox servers. This proactive measure is critical in preventing the rapid spread of malware through email, as many attacks leverage malicious attachments as their primary delivery method.

While other options mentioned can contribute to overall security in an email environment, they do not specifically target malware attachments as effectively as the attachment filtering agent. For example, a transport agent can modify the behavior of mail transport, but it doesn't inherently provide a safeguard against malware. Content filters focus on the content of messages themselves, assessing text or patterns within the email rather than the attachments directly. Connection filters primarily manage which connections are allowed or blocked based on IP addresses, which does not address the issue of malware within attachments at all.

Thus, the attachment filtering agent's targeted approach to managing attachments is essential for reducing the risk of malware spreading through email in an organization’s Edge Transport or Hub Transport servers.