Christian Zimmermann writes

But this just increases the mail that gets into my system. If I start doing the same thing, we will get emails bouncing around all the time and thus taking resources.

I have drunk wine already, but I am not sure I am too drunk to counter. The problem I see is as follows. Mail arrives to authors@khufu. It's a machine without spam filter. khufu fowards to you, me, Ivan. I spam filter, spam is rejected. Spam filter return messeage to authors@khufu, which get back to authors@khufu sending more mail to you. But if we are to put a spam filter on khufu, the spammers will see that the spam does not go through, but the spam will not be handed to you and me. Cheers, Thomas Krichel http://openlib.org/home/krichel RePEc:per:1965-06-05:thomas_krichel skype: thomaskrichel