Absolutely Ridiculous.
Who the *%^&$ is he to say that there is no specifically designated Subset" of HTML widely in use that has been adopted by people. How about just HTML? Surely Microsoft cannot say they support "HTML Emails" if they dont actually follow the HTML standard? Every other client at least manages to half way support HTML to a point where we can code something that looks good in a non retarded way. But No - because of Outlook all email developers have to create some "Fisher Price my First HTML" code to fit in with the MS word "Fisher Price my First Rendering Engine".
I am pissed off with this as I have just spent the last 2 hours trying to get my email to display correctly in Outlook 2007 - even after following the retarded 1995 method of coding HTML (tables - inline styles - no background images) it still doesnt look ideal. So even with my hands tied behind my back - Microsoft still takes pleasure in repeatedly kicking me in the balls and silently mocking me with broken layouts (and broken tables - HOW????).
Fine - so use word to compose the message but at least use Internet Explorer to Render incoming emails - thats is at least (a bit) less broken than your shitty email client.
I hope someone renders the face of the guy who decided that word rendering was a good idea.