Laurens Kils-Hütten writes:
So thanks a lot for clarifying. There's only one issue left I'm seeing right now. Mailman does not rewrite the Newsgroups: header. Thus mua's like Thunderbird which also talk NNTP offer to reply to the newsgroup instead of to the list.
To be quite honest, I think that's correct default behavior for multiprotocol MUAs. It's of course your choice as to whether the mailing list or the newsgroup is primary. If the mailing list, I think you should remove, not rewrite, the Newsgroups header.[1]
Steve
Footnotes: [1] Modulo the problem that there might be multiple groups there, but that would also make rewriting it a bad idea, since those other groups are probably not among the addressees, even if they have mailing lists.
-- GNU Mailman consultant (installation, migration, customization) Sirius Open Source https://www.siriusopensource.com/ Software systems consulting in Europe, North America, and Japan