Well, as suggested by Hellfire you can use td
width or you could place an element in the td and adjust its width. We could not use
CSS property Padding
as in Microsoft Outlook
padding does not work.
So what I had to do is,
<table>
<tr>
<td><span style="display: inline-block; width: 40px;"></span><span>Content<span></td>
<td>Content</td>
</tr>
</table>
With this you can adjust right and left spacing. For top and bottom spacing you could use td's height property. Like,
<table>
<tr>
<td style="vertical-align: top; height: 100px;">Content</td>
<td>Content</td>
</tr>
</table>
This will increase bottom space.
Hope it will work for you guys. :)