> Can you describe an opt-out mechanism that doesn't provide a spammer with exactly that same piece of "working email address" information?
An opt-out link carries only the email address, not the entire email header, so it conveys the absolute minimum information (and it can be visited independently of the email, by copying the link out of the email). Also, visiting an opt-out page is different than replying to an email for some complex legal reasons.
If a spammer ignores an opt-out request delivered to a Web page, he is in a very different position than if he replies to an e-mail sent by someone who doesn't know to avoid replying to a spam mailing.
The bottom line is that a spammer can say, "they emailed me, then I replied to what I thought was a customer's email." And this has been tried countless times. With an opt-out link, this dodge is removed.
An opt-out link carries only the email address, not the entire email header, so it conveys the absolute minimum information (and it can be visited independently of the email, by copying the link out of the email). Also, visiting an opt-out page is different than replying to an email for some complex legal reasons.
If a spammer ignores an opt-out request delivered to a Web page, he is in a very different position than if he replies to an e-mail sent by someone who doesn't know to avoid replying to a spam mailing.
The bottom line is that a spammer can say, "they emailed me, then I replied to what I thought was a customer's email." And this has been tried countless times. With an opt-out link, this dodge is removed.