On 27/03/2008, David Gerard <dgerard@xxxxxxxxx> wrote: > On the mailing list, perhaps threading *should* be determined by the > Subject: header; in practice, this is clearly not the case, to the > point where those expecting it to be berate those using other mail > clients to switch to KMail. I meant of course References: header. (Fortunately, I post-edited my message to say so. Go back and see!) - d.