eTapestry uses an HTML Editor to allow users to create many different types of templates. If you view the template in Outlook it is possible that it does not display exactly the same as it does in the eTapestry Editor.
This actually is an issue with Microsoft Outlook. Outlook 2007 to present uses Microsoft Word to render HTML email which causes the problem. Microsoft Word is specifically designed for printing documents rather than displaying HTML code.
Some common issues you may run into:
Padding around images is being ignored
Images are being clipped, rescaled, or not loading
There is extra white space in my content
Background image is not loading
This does not necessarily happen in all email providers. You may find the template renders fine in Gmail, Yahoo Mail, AOL, etc. It is good to test the email in multiple email providers before sending to see how each one renders the code differently.