Mail on mobile has too much space on the right

Hi Villatheme!

First of all, I love the plugin.
It is working fine but I have noticed that on mobile devices the emails are having a lot of space on the right as you can see in the video. I can’t seem to figure out why and how this is. Could you please provide me with a solution?

Also, is it possible to have HTML blocks? So we can embed html?

Thank you.