Novell Groupwise is the third biggest player in the corporate email market behind Outlook Exchange and Notes. A while ago we heard from a Groupwise product manager at Novell, Alex Evans, who wanted to test against our email acid test. We sent Alex the email, and he soon had some great news for us.
Novell Groupwise, in it’s current version 7, renders the acid test perfectly, which puts it right up with Apple Mail and Yahoo Mail in terms of support for modern HTML and CSS.

This is for the Windows version of Groupwise. The excellent result also applies to the WebAccess version, and although the testing has not been completed, Linux and OSX version are also expected to meet the same levels.
Great job Novell team! We appreciate your efforts in building your product, and also in being prepared to test your client against our emails. We look forward to similar results for some other email clients in the not too distant future!
Whereas emails sent to Yahoo! webmail subscribers in the past were appearing fine, recently it seemed like the rendering had changed. Paragraph spacing was now totally removed from many emails.
Diana ran some tests and was able to confirm that the spacing did disappear in both Yahoo! classic and the new version:

This is how paragraphs will now be spaced by default.
Fortunately, this is a simple one to fix. All you need to do is add a margin-bottom of 1em (either inline or in your stylesheet) and the spacing is back.

With the addition of a 1em margin, all is well.
It’s unclear at this stage why the change has been made, but it is a timely reminder that you can’t always rely on email client default settings – if it is important to your design, it’s always best to explicitly apply styles to each element.
Thanks to everyone who reported this to us, and to Diana for doing the testing.