Which attachment-based policy is required to hold specific file types in the Held queue?

The correct answer pertains to an attachment-based policy specifically designed to address concerns regarding potentially harmful file types. The "Suspected Malware" policy is crucial for holding file types identified as threats or containing malicious content in the Held queue. This policy serves to prevent the delivery of harmful attachments until they can be thoroughly inspected and verified for safety, ensuring a higher level of security by reducing the risk of malware infiltration through email.

The focus of the "Suspected Malware" policy is on identifying and quarantining attachments that may pose a security risk, thus safeguarding the email environment and protecting users from potential threats.

Other options, although related to email security, serve different purposes. "X-Block Dangerous File Types" aims at preventing the delivery of known dangerous file types altogether rather than holding them for inspection. "Attachment Management" is a broader term that generally involves managing and controlling attachments but does not specifically refer to a policy that holds files. "X-Attachment Hold on Type" may imply a holding mechanism but isn't as directly aligned with the purpose of managing suspected malware threats as the "Suspected Malware" policy is.