We have only just noticed that our daily backup has been failing. Is it possible for all administrators to get an email when this happens?
It's already there. The information about the last backup result (including error) is sent in the Daily status email. The daily status email needs to be set in "Admin > Configuration > Email" settings.
Thanks - I guess we just only want an email when something goes wrong (backups fail, disk utilisation > 90%, etc.), not just a daily email regardless. Otherwise you risk notification fatigue.