Not using any MUA, just a browser (Opera,
which is BTW in the official Debian list:
https://wiki.debian.org/WebBrowsers, non-free but I don't know
why as it is a Mozilla clone; Mozilla isn't free and Google
Chrome is :-D), and I read the posts of the list in this
browser (or in any other) e.g.:
https://lists.debian.org/debian-user/2016/06/msg00437.html
where I read:
Reply to:
debian-user@lists.debian.org
Leon.37428 (on-list)
Leon.37428 (off-list)
So IMHO the list CoC doesn't seem to exclude
any of the 3 types of answer ;-).
Cheers
Jacques
I said that some time ago and was called to task by some folks on
the 'net who said that Mozilla is FOSS. I don't really care--I am
not going to try and modify the code!