Personally I believe that every high school student should have to take a course on proper email etiquette. This would be highly beneficial for both university and then their workplace career.
At all of my workplaces it is apparent that email etiquette is lacking. From the tone of the email to the lack of proper grammar, it makes me disappointed. I am not sure when it became okay to lose professionalism in emails, maybe because it is a common casual way of communicating and this fact spills into the workplace.
In the past, letters typewritten or handwritten would be frowned upon if they were written in the manner that many of our email communications are currently written.