From a straight business perspective it's not a waste of time, since the candidates you reject may be candidates you want in the future. It's always good to be

From a straight business perspective it's not a waste of time, since the candidates you reject may be candidates you want in the future. It's always good to be polite. It would be an advantage to send a form letter nowadays, since job seekers will remember it. And come on. You have a list of emails. Do you really think it's insurmountable for a business to send an email to a list of emails? My "promotions" inbox begs to differ.