What markings apply when crafting an email that contains a classified attachment?

When crafting an email that contains a classified attachment, all standard classification markings must be applied. This means that not only does the attachment itself require appropriate classification markings, but the email as a whole also needs to indicate the classification level. This ensures that anyone who accesses the email understands that it contains classified information, thus providing clear guidance on handling and dissemination according to security protocols.

Applying classification markings to the email itself is crucial for several reasons. First, it alerts recipients to the sensitivity of the content, helping to protect against unauthorized access. Additionally, it maintains compliance with security policies that dictate how classified information must be handled, both in written form and in any associated correspondence. By marking both the email and its attachment, you create a comprehensive framework for security that reinforces protocols around classified materials.