Does anyone's roles involve designing responsive html emails by any chance? if so I'd like to ask what tool you use for that. The website topol.io used to work pretty well for that(up until K2 Five 5.2) , but now when I send emails using their design from K2, it displays the Desktop version on mobile and the mobile version on Desktop (outlook) so idk what happened with it. I've tried a few other email design websites but they all seem to have some sort of issue.
Basically my question is, does anyone know of a good responsive email designer that works well on K2? it could be a software or a website.