What is the recommended action for emails that contain attachments of various classification levels?

The preferred action for managing emails that contain attachments classified at different levels is to classify each attachment independently. This approach aligns with the principles of safeguarding information according to its specific classification, ensuring appropriate handling and access controls are applied to each item. By classifying each attachment based on its individual security requirements, you maintain the integrity of the classification system and comply with regulations regarding information security.

This means that if an email has attachments only marked with the highest classification level, that could lead to potential misuse or exposure of lower-level classified information if not all items are appropriately identified and protected. Each attachment should accurately reflect its own classification to ensure that the information is managed and protected according to its sensitivity.