I believe I have opt-out all marketing related emails. However, I am constantly receving marketing emails which is labeled "THIS IS A SERVICE-RELATED EMAIL" at the bottom, and there is no button to unsubscribe. For example "Get peace of mind with Xfinity Parental Controls" or "Become an Xfinity Stream expert with these tips".
I never asked for these emails and the loose definition on "service related email" is illegal.
If I continue to receive these emails, I will file a compaint to FTC.