C

email dev Microsoft Outlook 2007 items all aligned left or aligned wrong

Go through the HTML and make sure the <table> has the width attribute to 100%. 
Then, align the <td> content with the align attribute.
There may be a lot of nested tables and you'll need to go through all of them.

<table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr>
        <td align="center">
            Your Content
        </td>
    </tr>
</table>