On Sep 7, 2006, at 10:21 AM — 9/7/06, Michael DeGregory wrote:

> One of our email addresses are being spoofed. The email address is  
> an owner
> of the list and when it gets served off the mailing is ignored by  
> listserv
> and we have to serve the address back on. Someone is spoofing our  
> email
> address to send spam to listserv.

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.