But in reality, don’t a proportion of these unsubscribe links do what the previous poster suggested: link you to a proprietary system that requires you to log in to ‘update your mail preferences’?
I recently had to solve a captcha in order to unsubscribe from something!
The unsubscribe link included a cookie in the URL which identified what is being unsusbscribed. Only the e-mail recipient would reasonably follow that link. And yet captcha in your face.
