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Question Insert Header List_Unsubscribe in Postfix

CobraArbok

Regular Pleskian
Server operating system version
Ubuntu 22.04.1 LTS
Plesk version and microupdate number
18.0.50
I want to insert the List_Unsubscribe header in Postfix so that it can also be used by clients like Thunderbird and not only by WebMail Roundcube.
How can I do it?
 
I want to insert the List_Unsubcribe header too. I am also using Thunderbird. Please let me know if you find any solution!
 
You'll find plenty of step-by-step guides with a Google search like "list_unsubscribe postfix".
 
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