I'm a little confused as to how to configure emails to be sent to an administrator/teacher/grader when an assignment is submitted in Moodle 2.4.
I've created a simple assignment, and a submission notification is emailed to the student submitting the assignment - so I know email settings are configured correctly.
There were no teachers assigned to this (new) course, but I override roles at the assignment level and added a teacher (by the way - is it not possible to add a Moodle administrator as a teacher? My username did not appear when selecting from the list?)
What might I need to configure to enable emails? Do I need to somehow assign a "grader" to this assignment? If so - how do I do this?
I'm not sure what you mean by overriding roles - but the teachers must be enrolled in the course in the first place and have mod_assign/grade capability to get the notification. (This is why admins don't get notified - they are not enrolled in the course).
The second thing is that there is setting in the assignment to control if these emails get sent or not - make sure it's enabled.