Hosted Email Security evaluates email messages, including their content and attachments, against a set of rules defined in Data Loss Prevention (DLP) policies. Policies determine files or data that requires protection from unauthorized transmission and the action that Hosted Email Security performs after detecting a transmission.
Create DLP policies after you have configured data identifiers and organized them in templates. For details about the data identifiers and templates, see Data Loss Prevention (DLP).
DLP policies apply only to outgoing email messages.
A maximum of 255 compliance templates can be selected for each DLP policy.