You can unsubscribe from the emails you receive from Nine by either clicking the unsubscribe link at the bottom of the email received
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By logging into your Nine Account and visiting your Email Preferences page:
Step 1: On 9now.com.au, make sure you are logged in then select your name and then 'My Profile' from the drop-down menu.
Step 2: Select 'Email Preferences' from the top menu, then adjust your email preferences as desired.