Peter, this may not be very effective.  Most spam I receive has bad 'fake' addre
sses for the mail forwarders.  It is easy to connect to an SMTP agent on port 25
 and fake everything in the header, all you need is a valid recipient address (I
 tried it, I can send mail to myself with no record of where it really came from
). The only record will be the IP address of the sending machine, perhaps in a m
ail received log, and that address can be 'spoofed'.
If the 'fake' addresses used are things like compuserve.com, you will just be ca
using misery for valid users.
   Regards,
     Ron Fial
----------------------------------------------
At 06:00 PM 7/14/98 +0000, you wrote:
>I have made it a habit to bounce each and every spam I get to the first 2
>hosts in the Receive: list, as postmaster@... and to the sender. The
>sender sometimes bounces but I don't care. The hosts which are misused for
>this appear to react real quick. As a Linux (and free BSD) user I happen
>to know that the mail admin can lock out messages from a certain source
>with just a single line of script ;) He can't do that if he is not aware
>of being used... Of course you don't bounce the spam to any kind of list
>if you want to do this, pick the 2 domains before the last one.
>
>Peter
>