Currently the SMG allows only one set of notification settings about quarantine messages that apply to all users in the organization.
This limits the options to diversify notifications settings for different users. For example, if you wanted to allow managers to receive a notification message that has the option to release the quarantine messages rigth from the message, but configure a different message type for the rest of the users, the current configuration options don't allow it.
Most of the other settings in the SMG are tied to policy groups. However notification settings for some reason are global. There should be an option to create notification settings specific to policy groups