At any time you can update your preferences for the way in which you would like us to communicate with you. So, after login you can click on the header dropdown across your InterMiles Number and then select "My Profile" tab and under the "Communication Preferences" you can select the channel through which you would want to receive Marketing communication from and click on "Update".
However, you would continue to receive transactional, security and other critical email and sms alerts even if you unsubscribe from Marketing communications.