One this test email below the special offer the top box that has been set to just 200 stretches down in outlook showing the step. Because we are using these little tabs its a nightmare to get the white space to site at the bottom. Here is a link, any help would be great.
Check your code:
You have rows that aren't closed (line 58/59), <td>'s on top of <td>'s (line 61/62), <td>'s not closed (line 76).
You also have cellpadding/cellspacing in <td>'s (line 79) - these should be used on tables.
If you're using Dreamweaver you can run a validation and see which lines are causing issues.
Also, I'd recommend using nested tables rather than colspans/rowspans, as they're known to throw designs off.
Thanks for the comments, will take a look.