I've imported an HTML e-mail to Zoho Campaigns and all the pictures show up in the preview, but the background one doesn't show up when e-mail is sent. 

<td id="templateColumns" style="mso-line-height-rule:exactly;-ms-text-size-adjust:100%;    -webkit-text-size-adjust:100%;background-color:#ffffff;     background-image:url(' https://campaign-image.com/zohocampaigns/6_zc_v4_224816000000494004.jpg');     background-repeat:no-repeat;     background-;     background-size:cover;     border-top:0;     border-bottom:2px solid #EAEAEA;     padding-top:0;     padding-bottom:9px;;" valign="top">

Do you know what can I do to solve it?

Thank you very much