The response from my call to arms a few days back has been phenomenal. We saw some great comments, loads of inbound links from other designers and some very encouraging "how can I help" emails from many others.
As I mentioned in the original post, an important part of moving forward is first establishing a set of baseline standards that we can encourage email client manufacturers to meet. This baseline is crucial as it will form the crux of our recommendations and hopefully shape minimum standards for email rendering across the board. It's also something you can help with.
Working closely with our resident email design guru Mark Wyner, we have established what we think is the core set of features that will form this baseline. What's important to remember here is that we're not crossing our arms and demanding perfect standards support. We're simply asking for the more critical CSS standards to be supported so we can properly separate content from presentation and ensure a simple design will render consistently across all of the popular email clients.
With this in mind, here's the list so far:
UL, OL, DL properties
different link colors
This is where you can really help make a difference. Please leave your own comments with anything you think is missing or might not be of crucial importance to standards support in email. Once we've received your feedback, we'll make any amendments and get stuck into the testing/recommendations for each manufacturer. A new site bringing all this together isn't far off either.