Which one is not an option for Attachment Protection Delivery?

The correct answer focuses on the capabilities associated with Mimecast's Attachment Protection Delivery features. Specifically, Enhanced File Filtering is not recognized as an option within the Attachment Protection Delivery framework provided by Mimecast.

Attachment Protection encompasses several methodologies to ensure that file attachments are handled securely, including Safe File with Pre-emptive Sandbox, which proactively analyzes files before they reach the end user to detect potential threats in a controlled environment. Secure File Sharing enables users to share large files securely without exposing the organization to risks associated with traditional email attachments. File Size Limit Enforcement serves to impose restrictions on the size of files that can be sent or received through email, further enhancing security by controlling potential misuse of the email system.

However, Enhanced File Filtering does not align with the offerings of Attachment Protection Delivery. Instead, it refers more generally to processes outside the specific context of handling attachments. This distinction clarifies why Enhanced File Filtering is not categorized as an option within the Attachment Protection Delivery features.