I have an issue with RWD and mails. I've send a basic Foundation for Emails template and make checklist test. I see big part of mobile email clients (including GmailApp on Android 6.0 and iOS, Gmail App IMAP and more I've attached) don't render emails properly, maybe ignoring media-queries, and making content really small.
Please take a look at previews. Did you find any solution for that guys?