I just wanted to say that I take you at your word followed by a modest version of the interdiction below, but then I noticed your fine piece of corporate doublespeak of only allowing opt-out against mail from free users of your service, which allows you to show a pretense of trying to do the right thing while at the same time co-opting those concerned about your offering into providing arguments for up-selling your customers.

So I once and for all forbid you to include any of your tracking technology into any message that is sent or forwarded to any email address that I currently use or own, or which I will at any time in the future use or own. In addition, I also forbid you to collect, store, process or share any information related to any email sent to or recieved by me or any email account I can access, or related to any device or software I may use to access this mail. And no, I am not mad or gullible enough to tell someone so completely lacking in moral judgement as to even think about implementing a feature like that and then defending it in the way you do any information about my email adresses, to protect them against being sold to other equally dishonest email senders, or abused in other ways.