using the Interactive layout you create Flash (SWF) not HTML, so I moved your question to the Web layout forum. Using the web layout you can create HTML. As far as I know SWF can't be embedded in email.
Regarding coding HTMl emails, please google for "Common HTML Email Coding Mistakes", it will find several articles telling you what is best practise for HTML emails and where obstacles are.
Does that help?
Get Creative Pro Tools worth $1000 when you buy or upgrade QuarkXPress 10
Go Pro (while supply lasts):
Want to create stunning HTML5-based animations for apps? Simply use InDesign or QuarkXPress
with App Studio, no other tool needed: http://AppStudio.net
Need immediate help?
Please contact Quark's support: http://support.quark.com/contact_us.html
Follow App Studio here: https://twitter.com/publishhtml5
Follow QuarkXPress here: https://twitter.com/QuarkXPress
Follow me here: https://twitter.com/HamburQ