[deepandmeaning]

I found the hacks for display issues in various clients to be very helpful.

It's increasingly difficult to design HTML email templates which render well across all clients, this usually leads to design for the lowest common denominator. Usually Outlook and Gmail.

I'm sure there are loads of considerations for ISP's with regard to spam and other issues, but forcing design/rendering of HTML to 1990's type style and functionality is rather restrictive.

At some point I hope things will change, but with the popularity of mobile clients growing (and their small screen issues), I suspect if anything it will not.