Border

Standard – Add a border to a <td> (instead of a table). Feel free to use shorthand for the CSS on a border.

<table cellpadding="0" cellspacing="0" border="0" width="100%">
  <tr>
    <td align="left" valign="top" style="border:1px solid #3a3a3a;">
      <table cellpadding="0" cellspacing="0" border="0" width="100%">
        <tr>
          <td align="left" valign="top" style="font-family:Helvetica, Arial, sans-serif; font-size:14px; mso-line-height-rule:exactly; line-height:18px; color:#3a3a3a; padding:20px 20px 20px 20px;">Bordered Text</td>
        </tr>
      </table>
    </td>
  </tr>
</table>

Works Everywhere – This is not really a border border 😉 We are currently really loving this technique.

<table cellpadding="0" cellspacing="0" border="0" width="100%">
  <tr>
    <td align="left" valign="top" bgcolor="#3a3a3a" style="padding:1px 1px 1px 1px;">
      <table cellpadding="0" cellspacing="0" border="0" width="100%">
        <tr>
          <td align="left" valign="top" bgcolor="#ffffff" style="font-family:Helvetica, Arial, sans-serif; font-size:14px; mso-line-height-rule:exactly; line-height:18px; color:#3a3a3a; padding:20px 20px 20px 20px;">Bordered Text</td>
        </tr>
      </table>
    </td>
  </tr>
</table>