How to create a policy to detect unscanned email if Symantec Network Prevent bypass is enabled
By default, outbound email bypasses Symantec Network Prevent if Symantec Network Prevent is unavailable. Sensitive data can leave your site unscanned if Symantec Network Prevent servers are unreachable. However, you can configure a policy on Symantec Messaging Gateway to prevent unscanned messages from leaving your site.
You can prevent unscanned messages from leaving your site when you create a content filtering policy for unscanned messages. In this policy configuration, the administrator of the content filtering folder receives notification if an unscanned message is detected. Unscanned messages are held in the content incident folder for review.
Alternatively, you may not need to store unscanned messages but want to be notified if messages are unscanned. You can create an email content filtering policy on Symantec Messaging Gateway to send an email notification if unscanned messages are detected.