To stop receiving newsletters from us, you can manage it from your account page.  Here's the easy  steps with visual guide below for your reference. 

1. Make sure to click here to sign in to your active account. Then, click the Initial Letters of your name (Located at the top right corner of the page). 

2. Click "Email Settings". 

3. Then, uncheck or check the box based on your preference. 

NOTE:  Do not forget to "Save Changes" your new preferred setting.