So I have been trying to figure out why my email does not look responsive in Yahoo and after hours of investigation, it turns out that Yahoo does not like the <head> tags. removing them from the top of your email will enable it to look responsive.

Very dumb and I have no idea why but bringing this to your attention

Any thoughts?

UPDATE so I tested it sending from exact target and it appears it is not responsive anymore. God damnit. I am going crazy.

Why is my email not responsive in yahoo mail yet?