On 2015-12-21, Steven D'Aprano <st...@pearwood.info> wrote: > On Tue, 22 Dec 2015 08:44 am, Jon Ribbens wrote about mail clients that use > the Subject line to thread messages: >> Also: Thunderbird, The Bat!, Eudora, Gnus, Outlook, Outlook Express, >> Pegasus Mail, Pine, Apple Mail, Windows Live Mail, Yahoo Mail, >> Evolution, SquirrelMail, KMail, Windows Mail, etc. > > I understand that at least some of those will only use the Subject as a > fallback when other threading information is not available. That's a > reasonable strategy to take. > > As for mail clients that *always* and *exclusively* use the subject > line to implement threading, they are horrifically broken.
Yes, that would be bizarre and clearly wrong. Are there any such clients? I wouldn't put it past Microsoft to do such a thing, of course ;-) > So as far as I am concerned, if changes of subject line breaks > threading for you, so sad, too bad. Go without threading or use a > better mail client. I have no comment on that. > The whole purpose of the change of subject is to indicate in a human-visible > way that the subject of the thread has changed, i.e. that it is a new > thread derived from the old one. If that breaks threading, oh well, it > breaks threading. That sounds a bit confused - if the *intention* of changing the subject line is to create a new thread, then breaking the thread is not "breaking threading" ;-) >> And, yes, fixing the mail clients of "everybody else in the world" >> might be a lovely idea but it is a little impractical to implement. > > Less impractical than insisting that "everybody else in the world" must > change their posting habits to suit those using broken mail clients. Fortunately I haven't suggested that. -- https://mail.python.org/mailman/listinfo/python-list