At 08:20 4/21/2005 Thursday, Wohlgemuth, Mike wrote:
>Now I find out the spammers are sending messages to my various lists (all 
>of which are private, only editors may post) and bcc'ing users in our 
>domain and outside our domain, to bypass our spam servers ... the To: 
>message gets sent to the editor for review (which is tossed) , but the bcc 
>goes on to the user, whether internal or external to the domain ...

First, are your lists REVIEW= OWNER, SUBSCRIPTION= OPEN,CONFIRM?

Regardless (the barn door was open) AND if I understand your circumstances -- since LISTSERV is not the vehicle (intermediary) that is deliverying the email, how can it be used to stop the delivery? e.g.,

From: spoofed_address
To: your_list
BCC: any_userid@host

since LISTSERV doesn't provide the pathway to any_userid@host, it can't stop the delivery.

/Pete