Two copies of email when cc-ed in mailing lists

[Will Yardley]

On Thu, Dec 05, 2024 at 12:43:12PM -0500, Kurt Hackenberg wrote:
> On 2024/12/05 01:08, Rene Kita wrote:
> 
> > I wonder if the argument that modern MUAs make it easy to choose between
> > 'reply' and 'group reply'/'reply all' still holds.
> 
> The List-*: headers probably didn't exist 25 years ago, when that Reply-To:
> piece was written.

They're ~ 26 years old now:
https://datatracker.ietf.org/doc/html/rfc2369 (1998)

That said, I think Thunderbird is an outlier here too.

But either way, the issue mentioned in that Reply-To piece is still
relevant now, because the exact argument is that munging the reply-to
header to the list's address (which is not necessary in the case where a
mailer supports a direct "list-reply" option) is harmful because you
could reply to the list when you're trying to reply to the original
sender _exactly_ applies in this case.

w