How to setup the One-Click Unsubscribe and Unsubscribe Header

Your software
My Mautic version is: 4.49
My PHP version is:
My Database type and version is:

Your problem
My problem is:
how to setup one-click unsubscribe in the email body header in Mautic version of 4.4.9 and 4.4.8
I am attaching the screenshot for reference about my requirement.

You are asking how to set up and showing a gmail unsub header, right?
Gmail will not show the unsub header for everyone. More info here:


You should upgrade to 4.4.11.
If for some reason that is not an option, and if you are a tech person, you can apply the necessary change (DPMMA-2537 RFC 8058 one-click unsubscribe [backport] by patrykgruszka · Pull Request #13117 · mautic/mautic · GitHub) manually.