Once you are in 'My Verizon', navigate to 'Profile' (located 5 sections from the default 'Home' on the blue menu/navigationselections on the left hand side).
Go to 'Email Preference Center' and click the dark grey 'Manage' button.
You can control the setting for receiving messages for 'New Products, Free Trials, Features & Special Offers' and the 'Spotlight Entertainment Newsletter'. If you see a blue envelope next to these two options, click on the blue envelope (which should then change to grey) and that will change your notification setting from subscribed to not subscribed.
You can also check the 'Opt Out of all Marketing Emails' checkbox, to cancel all marketing emails from Verizon. Click the red 'Save' button.
You may alo want to 'Manage' the 'Notification Settings' section above 'Email Preference Center' to unsubscribe from any of the following: 'Certain Local, State, National Regulatory Notices', 'Bill Notifications', 'Payment Reminders', or 'Malware and Security Notifications'. Click the red 'Save' button' after making any changes.