Automatic notification to candidates when a Job Req is filled

Summary

Automatic notification to candidates when a Job Req is filled

Content

Hi,

I created a job requisition setting to 'Yes' the 'Automatically fill requisition' field, in order to automatically close the position when the number of hired people is equal to the number of openings.
Our aim is to send an automatic notification via email, when the job requisition is automatically field, to the candidates who applied for the position but have not been hired, in order to inform them that we thank them for their application, but the selection process has been closed.
How and where can I configure this kind of notification?