What is the most reliable clearfix method for HTML in emails?

clear doesn't work in Outlook 2007/2010, as well as display (and many other 开发者_Go百科CSS properties). What should I use?

I need to support all of the clients in this matrix, except Lotus Notes.

FYI: I am using an XSL that is building all grid-based markup with tables. However, I have a table unit that is overlapping another (only in Outlook 2007/2010) somehow.

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As much as it pains me to say it, you must use tables for email templates. This tutorial on Nettuts will help you out 20 Email Design Best Practices and Resources for Beginners