You can easily add a vertical line to your design without the use of an image by using background-colour.
Below you find an example with an orange 2px vertical line which automatically adjust to your table design:
Below you find the HTML source:
<table border="0" cellpadding="0" cellspacing="0" style="width: 500px;"> <tbody> <tr> <td style="width: 378px;">Text<br /> Text<br /> Text</td> <td style="width: 10px;"> </td> <td style="width: 2px; background-color: rgb(247, 121, 16);"> </td> <td style="width: 10px;"> </td> <td style="width: 100px;">Logo</td> </tr> </tbody> </table>