Una cosa del genere:

codice:
<table width="100%"  border="0">
  <tr>
    <td align="center" valign="middle"><table width="100%"  border="0" align="center">
      <tr>
        <td></td>
        <td></td>
        <td></td>
      </tr>
      <tr>
        <td></td>
        <td></td>
        <td></td>
      </tr>
      <tr>
        <td></td>
        <td></td>
        <td></td>
      </tr>
    </table></td>
  </tr>
</table>