Box Shadow

<table cellpadding="0" cellspacing="0" border="0" width="100%">
  <tr>
    <td class="boxShadow" 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;">Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1 Column 1</td>
  </tr>
</table>

css

<style type="text/css">
.boxShadow {
	-moz-box-shadow:3px 3px 5px rgba(0,0,0,0.3);
	-webkit-box-shadow:3px 3px 5px rgba(0,0,0,0.3);
	box-shadow:3px 3px 5px rgba(0,0,0,0.3);
}
</style>