title: Warning: <td> attribute with missing trailing quote mark
body: <p>I'm working on an email template and I received I few error once a validated the code:</p>
  
  <p>Warning:  attribute with missing trailing quote mark</p>
  
  <p>Here is the code:</p>
  
  <pre><code>&lt;table border="0" cellpadding="0" cellspacing="0" class="columns-container banner"&gt;
      &lt;tr&gt;
          &lt;td align"center" valign="top" style="height:235px; width:696px;"&gt;
              &lt;a href="http://www.researchnow.com/en-US.aspx" target="_blank"&gt;
                  &lt;img alt="Thanks for visiting our website" src="http://sigs.researchnow.com/NA_Emails/US_Emails/Healthcare/healthcare_responsive_html_email/banner.jpg" border="0"&gt;
              &lt;/a&gt;
          &lt;/td&gt;
      &lt;/tr&gt;  
  &lt;/table&gt;
  </code></pre>
  
  <p>Thanks in advance!</p>