The "VM" mail reading package for GNU Emacs maintains the "References:"
header. Observe the headers of this message for an example. However, it
doesn't use them for anything. Other MUAs may do similar things.
Anyway, I prefer newsgroups in general. The main advantage of mailing
lists is their flexibility. You don't have to get hundreds of people to
agree with you to get one running.
Joe Wells <jbw @
Member of the League for Programming Freedom --- send e-mail for details