I have tried personally joomla mail function.i've atteched a backgroung-picture of mail message body.
Image show all mails like : Gmail,Yahoo,Rediff etc.
Although not show in outlook 2007.
i m seaching in internet. although not have any solution and allow me to one factor img tag is support in outlook
Thanks ahead of time
Background images aren't supported in Outlook for just about any elements apart from your body tag of the HTML email. Your body from the email isn't the same factor because it refers back to the items in the e-mail and never the HTML body tag.
You could also see this hack make it possible for background images in outlook - http://emailmarketingvoodoo.com/blog/post/outlook-2007-can-now-render-background-images/