The “List-Unsubcribe” email header is implemented and working.
But mail software sometimes fetches URLs in mail header fields, and thereby accidentally triggers unsubscriptions in the case of the List-Unsubscribe header field.
The rfc8058 requests an additional email header: List-Unsubscribe-Post: List-Unsubscribe=One-Click
resulting in a post request.
Hi, tes, I’ve this topic on my list of new developments. Actually we should block direct visits of the link, since that request is transformed in a post. We need, to implement the feature above, manage to bypass some checks if there is a direct post.