Is there any way to display html email's background image in MS Office Outlook ?

Is there any way to display html email's background image in MS Office Outlook ?

Hi,
I'm trying to testing my html email in CRM, tab Lead, click on "Send Mail" button at the right side panel.
Copy the html source code and send out test mail.
Note that in my html code has some VML language tag (use to set the link of background image to display them in MS Office Outlook).
The mail look really good in web-based mail, but in Outlook the background image cannot be displayed.
I've ran into the same problem when i try out Zoho Campaign, using the directly input html source code in the HTML Editor.
When i use "Import/Upload" feature, upload html file and images worked for Outlook in this case.

I've already ask on Zoho Campaign forum for support and mod was answer that in the case of VML i must use the Import/Upload instead.
Is there anything familiar to Import/Upload feature in Zoho CRM ?
And if not, please tell me how to make the background image display in Outlook.

Thank you.
Huy