如何正确对齐响应电子邮件的图像与左侧空白区域

I'm aiming to right align 4 social icons in the header of an email. Mock up and code below. The main issue I've run into is that there is only empty space to the left side of the icons. An empty td with a width pushes the set of images outside of the viewable area at small screen sizes.I'm aiming to right align 4 social icons in the