Interesting problem I'm having. This only happens in Outlook 2013. I have a table with a heading row. Each data row has an image in the first cell. The first row of data is double height than the rest of the rows even though it has all the same formatting as the other rows. Does anyone have any insight into this? When I remove the image the height is normal. I'm setting the height with the height attribute and I've also tried setting the height in a style. I've tried setting the line-height as well to no effect.