This is a definitive guide into hiding content on desktop and web clients that you only want displayed on mobile email clients.
These days, responsive design is getting popular on email. Having the layout and sizes of elements change when viewed on a desktop vs mobile environment make for a much more pleasing email experience for the recipient.
The question is, what is the best way to hide content that you only want seen on a mobile device - such as a call to action to try out your mobile app or a clever layout trick - so that it is not displayed when the user opens on an email on a desktop or web client? ...