Indeed. I use Sendgrid for transactional emails and have disabled all tracking. Email is hardly a guaranteed delivery system by nature, I do not need to have

Indeed. I use Sendgrid for transactional emails and have disabled all tracking. Email is hardly a guaranteed delivery system by nature, I do not need to have proof of delivery or proof of opening by tracking systems or even the logs (beyond needing to debug if a customer asks why they didn't get an email). In fact, all I really need is the ability to resend a transactional email on demand, or the equivalent action I can communicate (in my case I run forums, and a transactional email would say "someone replied to your comment" and I can point at a page on the website that has the feed of recent actions).