To start the process, open up an email that was recently sent to you, and click the unsubscribe link in the mail (the link is visible on the top right header, or at the footer of the email).
Continue as follows:
A new screen will open up with the Unsubscribe dialogue box. Select the first option: "I no longer want to receive these emails".
Click, Unsubscribe me from the following emails.
Select only the categories you would not like to receive emails from.
Once done, click on Submit to complete the update.
You will no longer receive emails related to these categories.
If you have any queries, click here to log a support request.