What (if any) pitfalls would I encounter If I wanted to use minified HTML code for deployment as an email? 

Wouldn't the use of minified code ensure proper rendering accross the majority of different clients given I took the necessary precautions in targeting the clients I intend to support?

More specifically, trying to remedy issues like closures and white spacing in some versions of Outlook, etc. I live by properly formatted code, so hacking the beauty that is nicely formatted code seems like overkill if I could just minify it, deploy it, and call it a day..