As Hotmail introduced the new version of it's webmail client, some rendering issues occured. More and more subscribers are being converted to the new version hence more and more of your subscribers will be confronted with this issue.

The problem is the rendering of the width and background colors. The new client will only render to the highest width defined in pixels in your code. So using a containing table width="100%" won't resolve anything, and will end up not showing your mail as you'd expect!

The guys over at Emailcenter have published a quick-fix which you can find below. Use this code to change the rendering in Hotmail .

<STYLE type=”text/css”>
.ReadMsgBody
{ width: 100%;}
.ExternalClass
{width: 100%;}
</STYLE>

thanks to Simon Bannister over at the Emailcenter.UK