Newsletter can't hide responsive content on gmail and when I try to forward the e-mail

Question

I am trying to write a newsletter but I am having trouble hiding the responsive contents when I test on GMail. On Outlook and Yahoo

Answer 1

The bad news here is that, unfortunately, GMail does not yet support media queries nor does it support the display, overflow or visibility properties.

See Campaign Monitor's CSS Support Guide for Email Clients for more information.

Other than rewriting your newsletter to be completely fluid, rather than trying to make it responsive, I'm afraid there's no real solution to be had here.