Hi! Thanks for your response!
This doesn't fix the issue. Here's how my customer header reads right now:
<!--[if (gte mso 9)|(IE)]><table align="center" border="0" cellspacing="0" cellpadding="0" dir="ltr" width="640"> <tr> <td align="center" valign="top" width="440"><![endif]--><table align="left" border="0" cellpadding="10" cellspacing="0" style="height: 80px;" width="350" id="emailPreview"> <tr> <td align="center" valign="top" id="logoContent"> </td> </tr></table><!--[if (gte mso 9)|(IE)]> </td> <td align="center" valign="top" width="200"><![endif]--><table align="right" border="0" cellpadding="10" cellspacing="0" style="height: 80px;" width="350" id="emailLogo"> <tr> <td align="left" valign="top" id="previewContent"> <div class="company-info" style="font-size: 14px; font-weight: lighter; color: #787e81; text-align: right;" align="right">%company_name%<br /> Phone: %company_phone%<br /> Fax: %company_fax%</div> </td> </tr></table><!--[if (gte mso 9)|(IE)]> </td> </tr> </table><![endif]-->
I have entirely removed the line: <h1 id="logo" style="max-width:150px;">%logo%</h1>, but the logo still appears and the issue is not fixed.