Can't figure out where this is coming from.

<div style="background-color:transparent;">
            <div class="block-grid " style="Margin: 0 auto; min-width: 320px; max-width: 600px; overflow-wrap: break-word; word-wrap: break-word; word-break: break-word; background-color: transparent;;">
            <div style="border-collapse: collapse;display: table;width: 100%;background-color:transparent;"><!--[if (mso)|(IE)]><table width="100%" cellpadding="0" cellspacing="0" border="0" style="background-color:transparent;"><tr><td align="center"><table cellpadding="0" cellspacing="0" border="0" style="width:600px"><tr class="layout-full-width" style="background-color:transparent"><![endif]--><!--[if (mso)|(IE)]><td align="center" width="600" style="background-color:transparent;width:600px;" valign="top"><table width="100%" cellpadding="0" cellspacing="0" border="0"><tr><td style="padding-right: 0px; padding-left: 0px; padding-top:5px; padding-bottom:5px;"><![endif]-->
            <div class="col num12" style="min-width: 320px; max-width: 600px; display: table-cell; vertical-align: top;;">
            <div style="width:100% !important;"><!--[if (!mso)&(!IE)]><!-->
            <div style="padding-top:5px; padding-bottom:5px; padding-right: 0px; padding-left: 0px;"><!--<![endif]-->
            <hr style="display: block; height: 1px;
    border: 0; border-top: 2px solid #dddddd;
    margin: 1em 0; padding: 0; color: #dddddd;"><!--[if (!mso)&(!IE)]><!--></div>
            <!--<![endif]--></div>
            </div>
            <!--[if (mso)|(IE)]></td></tr></table><![endif]--><!--[if (mso)|(IE)]></td></tr></table></td></tr></table><![endif]--></div>
            </div>
            </div>