[Mailman-Users] News Gateway not spam

[MikeT at scitechsoft.com]

I am curios how to stop a news group poster from getting spammed 
by my list server.  When he writes the news group that is connected 
to my list server via "Mail-to-News and News-to-Mail gateway 
services."

Does that make sense?

In the case a list member of the suspect group is not reachable.  
Can I change the "return-path" of newsgroup postings?  So the 
poster on the news group does not get un-wanted undeliverable 
mail from my list server.

Thanks in advance for any help!

Regards
MikeT