Is this possible to create an alternate version of email for mobile devices and hide/unhide this with help of media queries?
Hey there xhtml-lab, while it's possible to present a dramatically different version of an HTML on mobile devices specifically with the help of media queries/CSS, it isn't possible to load say, a totally different HTML email document. That said, you can hide/unhide elements using a combination of display: none !important; and other CSS properties - here's a blog post which describes this.
Thanks, xhtml-lab! If there's anything else we can help with, be sure to let us know.