Hello,
Unfortunately some email clients do not support background images. We recommend using the “background” attribute for TD’s in order to get them working in Gmail (and most others).
For example:
<td background="http://www.example.com/image.jpg">content</td>
If you are looking for a hack for Outlook 2007 and 2010, you should check out this link: http://www.campaignmonitor.com/blog/post/3170/adding-background-images-to-your-email-in-two-simple-steps/.
And as always be sure to use absolute references to your images.
Cheers and happy testing!
Miki
