What is required for holding certain file types contained in a ZIP file?

Holding certain file types contained in a ZIP file requires specific attachment management settings. Mimecast's attachment management features are designed to analyze and manage the handling of file attachments, particularly within compressed files like ZIP formats. These settings specify which file types are subject to certain policies or actions, such as holding for review, quarantine, or blocking.

In practice, these settings allow organizations to enforce rules that align with their security requirements. For instance, if a particular file type is deemed high-risk, specific attachment management rules can be configured to hold or block these files within ZIP archives before they reach the end user. This proactive approach helps minimize the risk of malware or other security threats embedded within files that are commonly compressed for easier transfer.

The other options do not directly relate to the specific requirements for holding file types in ZIP files. Custom security checks pertain to predefined security measures that might not necessarily focus specifically on attachment types. A standard SMTP server is essential for email transmission but does not dictate how attachments are handled. Archived policies refer to data retention strategies and do not specifically address how to manage file types in attachments.