Using only <style> instead of <style type="text/css"> and putting each media query in it's own <style> so that it would strip just the ones that had problems.

Ah! Thank you! I have each one in a separate <style> and it only stripped bbpadding and and backcolor. Still not sure why it is though.

update
Yea, I didn't have them completely closed.

Hi Nicholas and Leo,

I already went through and removed all attribute selectors and thought that I fixed any possible mistakes but it is still stripping it. Thanks for the idea, I will be doing that next.

I posted the CSS that I was using to test below.

Update

It stripped every single style tag out still.

Hi Rémi!

Thank you for responding. I am using both my work email (Google Work apps) and personal email (Inbox) and both are stripping my style. I just checked and I don't have any special characters and even removed all attribute selectors. I will read through all the linked information, thank you for posting them.

Here is a sample of the CSS that I have tested.

    <style type="text/css">

    @media only screen and (max-width : 600px) {

        .hide {
                display: none !important;
                visibility: hidden !important;
                overflow: hidden !important;
                height:0px !important;
                width: 0px !important;
         }
         .bbpadding {
             padding: 10px !important;
         }
         .backcolor {
             background-color: #309 !important;
         }
         .changesize {
             font-size: 16px !important;
         }

    }

    </style>

A mailing I tested yesterday on Inbox was semi responsive. It put my 3 col layout into 2 col and looked nice, but it still is not changing the font size for mobile. The GMail app however still doesn't do anything responsive from what I can tell. I was coming on the forum to see if anyone else was seeing the promised responsiveness and I was just missing something in my code.