On Thu, 26 Jan 2012 13:44:50 +0100, Gregor Zattler <telegraph@gmx.net> wrote:
> Hi Jamie, Austin,
> * Jameson Graef Rollins <jrollins@finestructure.net> [25. Jan. 2012]:
> > On Wed, 25 Jan 2012 20:19:03 -0500, Austin Clements <amdragon@MIT.EDU> wrote:
> >> One very common cause of this is someone using "reply" to get an
> >> initial set of recipients, but then replacing the entire message and
> >> subject (presumably without realizing that the mail is still tracking
> >> what it was a reply to).  This can also happen if someone
> >> intentionally replies to multiple messages (though few mail clients
> >> support this), or if there was a message ID collision.
> > 
> > This is a very common occurrence for me as well.  I would put money down
> > that this is what you're seeing.
> 
> I thought about this too and this is why I checked for any
> occurrence of Message-IDs in the other emails: 
> 
>    |> I isolated the thread I was interested in,
>    |> extracted the message ids of its messages and greped the rest of
>    |> the messages for this message ids: no matches.[2] Therefore no of
>    |> the rests messages are part of the thread I was interested in
> 
> perhaps there was a logic error in how I did this:
> 
>    |> [2] grep -I "^Message-Id:" /tmp/thread-I-m-interested-in.mbox |sed -e "s/Message-Id: <//I" -e "s/>$//" >really.mid
>    |>     grep -I -F really.mid rest.mbox
>    |>     --> no match
> 
> /tmp/thread-I-m-interested-in.mbox  is a mbox with messages
> I'minterested in, the "real" ones.  really.mid is a list of
> Message-IDs of these "real" emails.  rest.mbox is a mbox with the
> other emails, Emacs showed in his notmuch show buffer but are
> other threads.
> 
> Since there is no match I concluded, the threads are not linked.
> Perhaps I made a mistake.  I'l retest it and report again.  But
> right now I don't have the time to do this.

Do you have an mbox file in the maildir indexed by notmuch? That seems
like the issue.

Jani.