moderated Re: Messages contain CC:group even with ReplyTo=sender and "Remove other options" #bug
It's still a problem, at least for subscribers with certain MUAs. I use Thunderbird, and the default reply action is always "Reply To List" even though the group is a [Announce-Only, Reply-to-Sender,Remove-other-options] group.
Even though configured to omit all options other than reply-to-sender, GIO is embedding many headers which contain the group posting email address:
Mailing-List: list firstname.lastname@example.org; contact ...
Delivered-To: mailing list email@example.com
Are all these necessary? I'm suspicious of List-Post and Mailing-List in particular. If these are not *required* by some protocol, it might be best to omit them for groups configured to not allow reply-to-list. Ideally the post-to-list email address would not appear anywhere in the message in that case (perhaps it could be mangled so a human would know what it is, but no MUA could know the posting address).
I'll attach the actual headers from a message I received recently from our group.