Sample HTML Signature Code

GiantUser.html

<style type="text/css">
  a.link{margin:0;padding:0;border:none;text-decoration:none;}
</style>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="format-detection" content="telephone=no">

<br />
<br />

<table id="sig" width='320' cellspacing='0' cellpadding='0' border-spacing='0' style="width:320px;margin:0;padding:0;">
  <tr>
    <td width="166" style="width:166px;margin:0;padding:0;">
      <a href='http://giantuser.com' title="GiantUser" style="border:none;text-decoration:none;">
        <img moz-do-not-send="true" src="http://cloudfront.giantuser.com/assets/giantuser_166_40.png" alt="GiantUser" style="border:none;width:166px;height:40px;">
      </a>
    </td>

    <td width="10" style="width:10px;min-width:10px;max-width:10px;margin:0;padding:0;">&nbsp;</td>

    <td style="margin:0;padding:0;">
      <table id="sig2" cellspacing='0' cellpadding='0' border-spacing='0' style="padding:0;margin:0;font-family:'Lucida Grande',sans-serif;font-size:10px;line-height:10px;color:#b0b0b0;border-collapse:collapse;-webkit-text-size-adjust:none;">
        <tr style="margin:0;padding:0;">
          <td style="margin:0;padding:0;font-family:'Lucida Grande',sans-serif;white-space:nowrap;">
            <strong><a href="mailto:[email protected] " style="border:none;text-decoration:none;color:#049cdb;"><span style="color:#049cdb">Matt Coneybeare</span></a></strong> <span style="color:#e0e0e0">&bull;</span>
            <a href="http://giantuser.com" style="border:none;text-decoration:none;color:#b0b0b0;"><span style="color:#b0b0b0">Owner</span></a>
          </td>
        </tr>

        <tr><td height='5' style="height:5px;font-size:5px;mso-line-height-rule:exactly;line-height:5px;">&nbsp;</td></tr>

        <tr style="margin:0;padding:0;">
          <td style="margin:0;padding:0;font-family:'Lucida Grande',sans-serif;white-space:nowrap;">
            <a href="http://giantuser.com" style="border:none;text-decoration:none;color:#b0b0b0;"><span style="color:#b0b0b0">GiantUser.com</span></a>
            <span style="color:#e0e0e0">&bull;</span>
            <a href="https://goo.gl/maps/cOuNG" style="border:none;text-decoration:none;color:#b0b0b0;"><span style="color:#b0b0b0">New York</span></a>
          </td>
        </tr>

      </table>
    </td>
  <tr>
</table>
<br />
&nbsp;

Your last "tr" should be a "/tr"

good find @perelijon! Thanks for sharing the code @coneybeare