I've been banging my head on this one for a few hours now. The desktop email client Zimbra interprets media queries as just regular CSS, the way Yahoo! does, so all emails that have media queries are showing up as their mobile versions in the desktop client.

Anyone dealt with this and know a fix? The Zimbra client is free to download and play with, if you're feeling up to it: https://www.zimbra.com/products/zimbra-desktop/index.html