At 10:37 AM 9/7/2006 -0400, you wrote:
>How to block this unwanted activity depends on your network
>infrastructure. Try contacting whomever is responsible for managing
>your LISTSERV's network ask for a block from the offending IP address
>on the firewall, assuming they have a firewall.
I'd be really surprised if it's the same IP address every time.
Nathan