I'm experiencing a really strange error with a new campaign: after I import the HTML of my pre-designed e-mail into Zoho the e-mail previews correctly within Zoho. 

When I send a live-test, however, the 'content' block does not display at all (only Zoho's own header and footer)!

Is this due to some encoding issue in our HTML, or an error with the way Zoho is importing the HTML?

Extra info: When I click 'View Source' in Outlook and then save the e-mail received as an HTML and then open it in an internet browser, the e-mail displays correctly!!!