First: Sorry for my bad english. I'm not a native english-speaker, so please ignore my mistakes. :o)
I'm running some lists with the NNTP-gateway enabled both ways. I've noticed that when mailman posts to the newsgroup, it changes the Message-Id. Or, I guess it's mailman and not INN. This generates problems with threading, since one message got two message ids.
An example:
test@lists.example.com both posts and collects messages from local.test at the news-server news.example.com. John and Anne are both subscribed to the list and Peter prefers to use the news-server.
John posts a message to the list with subject "Hello". John's client generates the message id <john123.456@example.com> for that mail. Mailman will now forward that message correctly to Anne, with the right message id. But when Peter reads the message at the news-server, he will see the message id <mailman.345.987@lists.example.com>.
So far, everything looks fine for the users. But now Anne wants to make a reply to John's post and posts a message to the list with subject "Re: Hello". This message has the In-Reply-To-header "<john123.456@example.com>", since this is the message id on the mail she recieved. Peter, who are still using NNTP, will not be able to find the message <john123.456@example.com>, since it has been renamed to <mailman.345.654@lists.example.com> on the news-server. Peter's newsreader will then create a new thread for the reply.
Are there any way I can let all the users of my lists recieve the same message ids, so my news-reading users will be able to get the threads right?
Thak you in advance.
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