I seem to be having a problem on mobile devices, I have set the body background colour to white however when I send a test it looses it and displays like this:

https://ibb.co/gC02wQ
https://ibb.co/gC02wQ

To give you an idea of what it is meant to look like,
this is what I am trying to achieve:

https://ibb.co/c61mO5
https://ibb.co/c61mO5