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How to Unsubscribe - Word to the Wise

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  1. They can stop the mail either by unsubscribing from it, or by marking it as spam. We’d far rather they do the first so we should make it as easy as possible for them to unsubscribe. “There are a few different ways to accept unsubscription requests, and most legitimate bulk mail should offer several of them.” Reply to unsubscribe

    In Opt-out processing workflows

  2. They can stop the mail either by unsubscribing from it, or by marking it as spam. We’d far rather they do the first so we should make it as easy as possible for them to unsubscribe. “Also in most jurisdictions you’re legally required to offer a functional, easy to use unsubscription channel.” Reply to unsubscribe

    In Opt-out processing workflows

  3. The recipient replies to the email, the person handling replies removes them from the list. This is a problematic way of handling unsubscription requests. “It’s better if those replies go to a customer support team, and when they do you want to empower the customer support staff to remove recipients from the list.” On the other hand spammers – especially B2B spammers who’ve fallen for “growth hacker” snake oil – love it. They think that forcing a recipient to reply to unsubscribe will count as “engagement” and improve the delivery of the rest of their spam. And that encouraging recipients to reply will open a channel for them to pitch whatever their crappy service is.

    In Opt-out processing workflows

  4. Reply to unsubscribe “The recipient replies to the email, the person handling replies removes them from the list. This is a problematic way of handling unsubscription requests.” On the one hand, sending mail that recipients can’t reply to, or where replies are bounced, responded to automatically or silently discarded is fairly recipient-hostile. It’s better if those replies go to a customer support team, and when they do you want to empower the customer support staff to remove recipients from the list. Using this for unsubscription is expensive and kludgy and not quite as reliable or robust as you might like. And you can’t just ignore those unsubscription requests and require your customer retention folks have a conversation with the recipient before you unsubscribe them – both because that breaks the law in many jurisidictions and because ain’t nobody got time for that, they’ll just hit the “This is Spam” button and move on.

    In Opt-out processing workflows

  5. The recipient replies to the email, the person handling replies removes them from the list. This is a problematic way of handling unsubscription requests. “On the one hand, sending mail that recipients can’t reply to, or where replies are bounced, responded to automatically or silently discarded is fairly recipient-hostile.” On the other hand spammers – especially B2B spammers who’ve fallen for “growth hacker” snake oil – love it. They think that forcing a recipient to reply to unsubscribe will count as “engagement” and improve the delivery of the rest of their spam. And that encouraging recipients to reply will open a channel for them to pitch whatever their crappy service is.

    In Opt-out processing workflows

  6. Eventually our subscribers won’t want our email in their inbox any more. “They can stop the mail either by unsubscribing from it, or by marking it as spam.” Also in most jurisdictions you’re legally required to offer a functional, easy to use unsubscription channel. So, how to do that? There are a few different ways to accept unsubscription requests, and most legitimate bulk mail should offer several of them.

    In Opt-out processing workflows

  7. Eventually our subscribers won’t want our email in their inbox any more. “We’d far rather they do the first so we should make it as easy as possible for them to unsubscribe.” Also in most jurisdictions you’re legally required to offer a functional, easy to use unsubscription channel. So, how to do that? There are a few different ways to accept unsubscription requests, and most legitimate bulk mail should offer several of them.

    In Opt-out processing workflows

  8. Eventually our subscribers won’t want our email in their inbox any more. “We’d far rather they do the first so we should make it as easy as possible for them to unsubscribe.” Also in most jurisdictions you’re legally required to offer a functional, easy to use unsubscription channel. So, how to do that? There are a few different ways to accept unsubscription requests, and most legitimate bulk mail should offer several of them.

    In Unsubscribe mechanisms

  9. And there’s no way to be sure that the email address they give you is their email address. Someone malicious may give you someone else’s email address. Sure, you could send that email address an email asking them to confirm they want to unsubscribe, but that would violate CAN-SPAM – and if you’re going to spend effort to do something like that, why not just do it right to begin with. “You should always know from the moment a recipient clicks their email address (and in more complex setups, which list they want to unsubscribe from).” Your first idea might be to include the users email address in the link – “https://example.esp/[email protected]”. That provides the information you need, but you should use an opaque cookie instead. That will give you the same information, but avoid leaking their email address to log files, third party vendors and so on.

    In Unsubscribe mechanisms

  10. You should have a webserver that serves an unsubscription landing page for a recipient, identifying the recipient via an opaque cookie in the URL. That same webserver should handle POST requests to unsubscribe RFC 8058 style at the same URL. “You should include an unsubscribe link in the body of your message, at the bottom of the mail where people expect to find it, pointing at that landing page.” You should have List-Unsubscribe and List-Unsubscribe-Post headers2and while you’re going that, add a List-ID header too. The List-Unsubscribe header should have one, and only one, https link in it pointing at your unsubscription webserver. Your List-Unsubscribe-Post header should contain the “List-Unsubscribe=One-Click” shibboleth.

    In Unsubscribe mechanisms

  11. Reply to unsubscribe “The recipient replies to the email, the person handling replies removes them from the list. This is a problematic way of handling unsubscription requests.” On the one hand, sending mail that recipients can’t reply to, or where replies are bounced, responded to automatically or silently discarded is fairly recipient-hostile. It’s better if those replies go to a customer support team, and when they do you want to empower the customer support staff to remove recipients from the list. Using this for unsubscription is expensive and kludgy and not quite as reliable or robust as you might like. And you can’t just ignore those unsubscription requests and require your customer retention folks have a conversation with the recipient before you unsubscribe them – both because that breaks the law in many jurisidictions and because ain’t nobody got time for that, they’ll just hit the “This is Spam” button and move on.

    In Unsubscribe mechanisms

  12. “Reply with Unsub.” “So unless you want to look like a bad B2B spammer, don’t advertise replying as a method of unsubscribing.” But if you accept replies then give your customer support folks who handle them the power to unsubscribe someone when asked.

    In Unsubscribe mechanisms

  13. They can stop the mail either by unsubscribing from it, or by marking it as spam. We’d far rather they do the first so we should make it as easy as possible for them to unsubscribe. “Also in most jurisdictions you’re legally required to offer a functional, easy to use unsubscription channel.” Reply to unsubscribe

    In Unsubscribe mechanisms

  14. the List-Unsubscribe header contains only one https link “the email is DKIM signed” the DKIM signature covers the List-Unsubscribe and List-Unsubscribe-Post headers

    In DKIM signing

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