I do use the receipt function at work.
Far too often some of the "kids" delete the e-mails and then complain that they didn't get told about this or that. Normally I'd rather do a face to face meetings with all of them but we'd be spending all day in meetings. Alos this way some of my personnel who would otherwise lie about not receiving or reading the e-mails have no leg to stand on. Its a shame but that's the way it is.