On Sat, 12 Jul 2008 00:15:36 +0100 Dan Kolb <gllug at eco.li> wrote: > Yes. Both mutt and Thunderbird use In-Reply-To: headers to do their > threading magic. As does claws-mail, -- All the best, John -- Gllug mailing list - Gllug at gllug.org.uk http://lists.gllug.org.uk/mailman/listinfo/gllug