Pine HTML/CSS Retina Background Image
<table align="center" cellpadding="0" cellspacing="0" role="presentation" width="100%">
<tr>
<td class="col" width="100%" bgcolor="#1F2225" background="https://picsum.photos/1400/1000?image=837" style="background-image: url('https://picsum.photos/1400/1000?image=837'); background-repeat: no-repeat; background-position: center; background-size: cover;">
...
</td>
</tr>
</table>