UNsubscribe links don’t work in txt version

Version : 8.1.1

When mails bounce we receive a notification from the recipient mail service. In the txt part, the unsubscribe link that is written does not work anymore, clicking on it makes a blank page with “ko” written. All was working fine before 8.1.1.

We always use this link to unsubscribe bouncing subscribers, it is easier than manually doing with his mail address on the website.

Partial source:

Message-ID: [email protected]
X-Mailer: EasyWPSMTP/Mailer/smtp 2.2.0
Precedence: bulk
X-Newsletter-Email-Id: 84
X-Auto-Response-Suppress: OOF, AutoReply
List-Unsubscribe: https://DOMAIN.org/site/?na=ocu&nk=4052-941fc778b0&nek=84-
List-Unsubscribe-Post: List-Unsubscribe=One-Click
MIME-Version: 1.0
Content-Type: multipart/alternative;
Content-Transfer-Encoding: 8bit


This site will teach you how to build a WordPress website for beginners. We will cover everything from installing WordPress to adding pages, posts, and images to your site. You will learn how to customize your site with themes and plugins, as well as how to market your site online.

Buy WordPress Transfer