When we heard from Carl that “Word/Outlook 2007 HTML rendering engine does NOT fully support border styles, despite the official documentation saying otherwise”, we ran a quick test of our own. That test confirmed that border styles, either inline or in the head of a document, do not render in Outlook 2007.

Here is how it should look

This is how Outlook 2007 renders the same code
Now that we have at least made contact with Google, it looks like Microsoft should be next on the list! Your ideas and suggestions are welcome. We also love to hear from you when you discover rendering issues like these, because we like to keep our reports accurate. You can email hello at emailstandards.org or leave a comment below.