Readie - 7:51 pm on Aug 7, 2013 (gmt 0)
Outlook is... Special. Different versions of outlook behave differently too, which makes it all the more fun.
I have seen a doctype destroy non inline css before on outlook 2003, and certain css selectors cause havoc too. Best advice is play around with it, reduce it down, then add stuff in bit by bit. When it stops working, you've found your problem.