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I followed this link to add my unsubscribe email header as below,

/^Content-Transfer-Encoding:/i PREPEND List-Unsubscribe: mailto:<sender-email-address>?subject=unsubscribe>"

so that the unsubscribe requests could directly go to the sender, instead to a specific email address, such as the case at this link, where the header uses mailto: like List-Unsubscribe: <mailto:xxxx@yourdomain.com>

But when testing my email at mailgenuis.com, I still get the issue "(-1 points) There is no List-Unsubscribe header."

So, is my unsubscribe header correct?

  • Your configuration could be ineffective in many different places. **Gather more diagnostics**. Postfix would log the header replacement, as it would unusable header_checks setup on startup. Sending a message to any mailbox you have access to will allow you to look at the headers yourself. – anx May 04 '22 at 04:34

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