> It doesn’t work well because you have to remember and do it manually every, single, time for every message to each recipient. I'm having the very same proble

> It doesn’t work well because you have to remember and do it manually every, single, time for every message to each recipient. I'm having the very same problem, but never knew there actually was an extension for that - though it's a bit disheartening to learn that at the same time it no longer works in the latest Thunderbird version. Hm... (There's also https://bugzilla.mozilla.org/show_bug.cgi?id=1518025 https://bugzilla.mozilla.org/show_bug.cgi?id=1518025 to port that functionality into Thunderbird itself, but it seems to have possibly stalled a little?)