html email outlook 2003 issue

I have an html email set up as

<td valign="top"><table width="650" cellspacing="0" cellpadding="0" bgcolor="#ffffff" align="center">
        <tr>
            <td width="25"  valign="top">
                <img src="/images/left_border.jpg" border="0" align="right" style="padding:0; display: block;">
            </td>
    开发者_C百科        <td width="600"  valign="top" style="padding: 0px;">
                <img src="/images/banner.jpg" border="0" align="left" style="padding:0; display: block;">
          </td>
            <td width="25" align="left">
                <img src="/images/right_border.jpg" border="0" align="left" style="padding:0; display: block;">
            </td>   
        </tr>
                 </table>
              </td>

However in outlook 2003 and entourage email clients, it appears as an additional border on left and right sides.

How can it be resolved?

It's not going to work well in Outlook 2007+ either because you're using non-compatible tags including padding: and display:. So, back to the drawing board all around. Here's a refresher on what the various browsers support: http://www.campaignmonitor.com/downloads/documents-tools/Campaign_Monitor_Guide_to_CSS_Support_in_Email_27_Aug_2009.pdf

Technically, the code you posted is invalid because it starts with a <td> which has to be inside a <table> and <tr> to be valid. I'm suspecting you posted just a snippet, so perhaps providing the entire context would be best.