As a person, who, on occasion, has to read email from people, who send me things, I wholeheartedly disagree with this statement. I do, technically, have to read some of them as it is part of my job description ( not completely unlike the teachers ) and very much a captive audience.

And I get that it is hard and everyone has their own idiosyncrasies and all that jazz, but, and this is probably the only time I will defend corporates, were it not acceptable language enforced by HR, those emails would somehow be even worse than they are now.

So the goal is the same.. give the audience what it wants. What do I get? Well, it varies..

edit: I am really enjoying the link provided, but clearly this guy is talking about a very different level of writer.