We see many times in gmail a small break right after an image. This looks really bad when we also have a different background colour, black for example, and we will see a very disturbing white line across our template.

There is a fix for that and it is quite simple. We need to define the image as a block element.

See the code below:

<img style="display: block;" src="http://www.mysite.com/cat.jpg" />