> email tracking links ... domains have nothing in common with the destination URL The tradeoff has been CNAME-ing your own subdomain to your Email Service Pro

> email tracking links ... domains have nothing in common with the destination URL The tradeoff has been CNAME-ing your own subdomain to your Email Service Provider’s tracking domain, which gets you a recognizable(-ish) URL, but has historically prevented https links, or using the ESP’s tracking domain directly, which allows https but makes sketchy-looking URLs. I’d think Let’s Encrypt would make it possible to offer https on white-labeled (CNAME’d) tracking domains. Seems like an opportunity for some enterprising ESP. (Yes, two other options are not tracking email links, or running your own tracking. I’m going to assume these are not realistic for most marketing departments.)