On Thursday 5 July 2018 23:17, Erik Christiansen <dva...@internode.on.net> put forth the proposition: > On 05.07.18 13:39, David Woodfall wrote: > > I've noticed now that my replies in that thread don't have a > > In-Reply-To for some reason. When I tag one and attach it with & as > > you said it joins fine and adds that. > > > > Why wouldn't mutt add that? It works fine eg in lists. > > It's ticked over 23:00 here, and I'm not recalling anything on the > missing In-Reply-To headers, but if there's still poor threading after > that's fixed, then here's what my notes say I did, back when: > > Debug: Maillist posts, lacking In-Reply-To or References headers, and with > "Fwd: Re: Fwd: Re:" pollution in the Subject, started multiple > threads, and mutt didn't cope: > Diagn: :set ? strict_threads > strict_threads is unset > :set ? sort_re > sort_re is set > # Default reply_regexp is simplistic, though. > Fix: Added in .muttrc: > # Note: Keep reply_regexp lower-case, to keep it case-insensitive. > # > set reply_regexp="^(((re(\\[[0-9]\\])?|aw|fw|fwd|\\?\\?|):)[ \t]*)+" > > There are even fancier regexes in the list archive, back in 2009/2010, > but they have more ambitious agendas. > > Erik
I found the problem: PEBKAC My vim mailer function that deletes Cc and Bcc lines was leaving spaces and the In-Reply-To header line was under those so it wasn't seen as being a header and not added... -D -- Linux is obsolete -- Andrew Tanenbaum .--. oo (____)// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~'