[meta] reply to the list

[Jan Stary]

On Feb 26 15:27:57, spooky130u at gmail.com wrote:
> On Tue, Feb 26, 2013 at 09:41:18PM +0100, Jan Stary wrote:
> > 
> > Increasingly often, I see people replying To: the original
> > poster, with Cc: to the list. Such a message does reach
> > the recipients, but
> > 
> > (1) it breaks the list functionality:
> >     none of the List-* headers is present in the message.
> >     Many people, me included, filter by sych headers.
> 
> There is a better way (with procmail, at least) that I use, which
> gets all list e-mail filtered to the mbox I set aside for the list,
> private responses to me in my own mbox, and replies to the list
> that are CC'd to me ONLY sent to the list.  I do not use List-
> headers---as you say, they aren't reliable.

I use procmail similarly, and the messages can indeed
be filtered by other ways too ("macports anywhere
in To: or Cc:"). But isn't one of the purposes of
the List-* headers to have a definite one line for that?
What else is List-Id for?