I have setup alerts for the usual events such as APs and switches going offline and set myself and other members of my networks team up as default recipients to receive these. We all have orginization privilege so don't fall under the default "All network admins" criteria and have to be added individually.
The network has a guest SSID with a splash screen that enable users to self-register. When a new user is registered I've set the "A new user registers via splash page" alerts field with the admin staff (guest ambassadors) who I would like to receive the email notifications and then action any requests.
There doesn't appear to be a way for the email alerts for the new guest users only to the sent to the guest ambassadors I've specified. Unless I'm missing something I don't think there is a way to keep alerts about network issues (i.e. AP going offline) and the day to day alerts for the likes of guest user approval separate?