To make the font works with Outlook, applying style=”font-family: sans-serif” to every <td> tag.

For example, there is this code in HTML:
<td align="left" class="paragraph">

You can place:
style=”font-family: sans-serif”
at the end before > like this:
<td align="left" class="paragraph" style=”font-family: sans-serif”>

This will make it works with Outlook :)