Is there a html conditional statement for everything not Outlook?
Try this:
<!--[if !mso]>-->
content targeted at non-outlook users goes here...
<!--<![endif]-->
To prevent statements being stripped in outlook.com, change <!-->
to <!-- -->
-
<!--[if !mso]><!-- -->
All Except MSO 07-13
<!--<![endif]-->
Super late response, but hopefully this will help someone. This worked for me:
<!--[if !gte mso 9]><!---->
<p>I'm not Outlook 2007/2010.</p>
<!--<![endif]-->
Edit: Answered above, but extra tags on the IF statement are to hide the tags from being revealed in IE7/8.