Add an background image to an email template in CRM

Add an background image to an email template in CRM

Hi all,

We wants to put an background image behind all our email templates. Is there a way to import this thru html. 

If i put the option background image in <body style="background-image:...</body> and i look to the preview it shows our background, but if i save the html all is gone.

What i'm doing wrong or isn't it possible. I added an example with an example image, if you look to preview it will show the images but if i save it, all html input is gone.
  1. <html><head>
  2. <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
  3. <meta content="width=device-width" name="viewport">
  4. <style>@media only screen and (max-width: 480px) {}</style>
  5. </head><body style="background-image:url(http://campaign-image.com/zohocampaigns/1_zc_v1_28642000005726110.png);" background="http://campaign-image.com/zohocampaigns/1_zc_v1_28642000005726110.png)"></body></html>