HTML Mail and CSS

Depends. The best way to find out, I think, is:

1. Uninstall or disable Emogrifier
2. Send and retrieve an email
3. Save the email body to an external file
4. Load the file in Firefox and use Firebug to examine and modify the document structure and CSS rules.
5. Add the necessary CSS rules to your style.css file.
6. Resend and recheck until the desired results are obtained.
7. Re-enable Emogrifier.

If the above works for you, I would greatly appreciate a write-up with sample files and/or screenshots so I can add your use-case to the documentation pages.