On Mon, 2019-04-29 at 09:08 +0100, Thomas Pircher wrote: > Curt wrote: > > Maybe that lead-in violates some RFC, although you'd think what's > > in the > > header's in the header and what ain't ain't and ne'er the twain > > shall > > meet. > > > > At any rate, bw threads fine here, so it must be you (or me). > > It's you -- or rather bw's MUA, I'm afraid. :-) > His mails don't thread in neomutt neither, specifically because the > headers sent by his MUA don't include neither the Reference nor the > In-Reply-To fields.
Yes, I checked that before posting. I also checked the web archives [1] where all of bw's messages appear under a "<Possible follow-ups>" heading. I'm guessing the archive is falling back to threading by matching the subject line, as with Curt's MUA? [1] https://lists.debian.org/debian-user/2019/04/thrd3.html -- Tixy