In mutt, I have sort by thread turned on, and it sorts just fine.
> On 20010201.1020, Cory Petkovsek said ...
>
> Hmmm, even though I replied with a subject of:
>
> Re: [Eug-Lug:60] Re: Threads broken...
>
> It came through as
> [Eug-Lug:64] Re: Threads broken... (Ie a new thread). Whatchyou think of that?
>
> Cory
>
> On Thu, Feb 01, 2001 at 10:16:38AM -0800, Cory Petkovsek wrote:
> > Test on my replying.
> >
> > Note mutt is sending with a subject of:
> > Re: [euglug ##] subject
> >
> > Cory
> >
> > On Wed, Jan 31, 2001 at 05:08:24PM -0800, Bob Miller wrote:
> > > Does anybody know why the eug-lug mailing list has broken threading
> > > lately? In the ongoing thread, "article", which Sean started this
> > > afternoon, some replies are in the thread (mine, Ron L.'s), and some
> > > aren't (Cory's, Bob C.'s).
> > >
> > > Threading relies on the Message-Id: and In-Reply-To: mail headers.
> > > A large fraction of our messages don't have the In-Reply-To: header.
> > >
> > > Did a bunch of people* upgrade to broken mail user agents in the
> > > last week, or is the mail server weird, or what?
> > >
> > > * I'm not assigning blame, but Rob H., Cory P., and Bob C. have all
> > > sent unattached replies today.
> > >
> > > --
> > > K<bob>
> > > [EMAIL PROTECTED], http://www.jogger-egg.com/