Sundeep Grapur has some great tips re: catering marketing emails to be read on mobile devices.
My favorite three:
- Design for the mobile browser in terms of font and images
- We preen emails from our smartphone: grabe their attention so they don't delete the message. Oftentimes, people go back to an email later from a desktop or laptop to really dig into the content.
- Your primary call-to-action should be a button and not a link.
