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Display mailing list header 0.3.2
by Jürgen Ernst
This extension implements RFC 2369 for Thunderbird: Special mailing list header fields in the mail are parsed, and the links are displayed in the extended header view. You can click them to simply go to the archive, request help or unsubscribe.
About this Add-on
You have to install Enigmail OR Mnenhy, as this extension relies on getting special headers from the mail which is very complicated to achieve in current versions of thunderbird.