Mail Security lets you apply X-headers to the email messages that contain content filtering rule violations or are spam or suspected spam. Symantec Enterprise Vault™ uses the X-headers to search for and retrieve the messages that are archived in the vault. Enterprise Vault is a data warehouse that provides secure, centralized archiving and retrieval of information.
X-headers can only be applied to SMTP transported email messages. X-headers cannot be applied to messages that are scanned in the message store.
Mail Security provides default X-headers that are commonly used by Enterprise Vault. You can modify the default X-headers, or you can create your own. You can apply up to 25 X-headers for a single violation.
When a message triggers one or more violations and the disposition for any of the violations is to delete the message, no X-headers are applied. For example, a message is identified as spam, and the disposition is to reject the message. No X-header is applied to the message.
Table: How X-headers are applied for multiple violations describes how Mail Security handles multiple content filtering violations based on where the violations occur within the message.
Table: How X-headers are applied for multiple violations