Receiving spam when posting to list

[Bruno Wolff III]

On Sun, Jan 15, 2006 at 19:41:29 +0100,
  Alexander Dalloz <ad+lists at uni-x.org> wrote:
> Am So, den 15.01.2006 schrieb Jeff Vian um 17:02:
> > On Sun, 2006-01-15 at 17:39 +0530, Vikram Goyal wrote:
> 
> > > I'm receiving spam posted underneath everytime I post to the list
> > > and so must be every poster. This is just to bring to the notice of the
> > > list admins.
> > > 
> > 
> > I am receiving the same.  It seems similar to the Peter Whaley spam I
> > was receiving until I started sending that to the bit bucket.
> > 
> > If he does not check his mail and empty the mailbox I will do the same
> > here.
> 
> I wrote the postmaster, so far no response. Maybe because of Sunday. If
> tomorrow the situation does not change I will request the list master to
> suspend list mail delivery to <jrhw at kol.co.nz>.

Bounces shouldn't be going back to the address in the from header in any case.
Bounces are supposed to go to the envelope sender address which should
go back to the list server (and can be used to detect and remove broken
email addresses automatically).