I'm not sure why you'd be getting this. Apparently someone (presumably someone malicious) has signed up [log in to unmask] to your mailing list. Since there's no subscription for that address, it's probably signed up with a forwarding address. The only method I can think of that would be guaranteed to get rid of the bad address would be by having all addresses confirm their subscriptions via an appropriate Renewal= setting. Here's another thing that could be tried: 1) Issue a "HOLD listname" command. This will keep messages from being distributed to the mailing list. 2) Send a message from an email address. This should not be your listowner address; perhaps a hotmail account would be the best way to go. 3) SERVE OFF the address you just sent the message from. A LISTSERV maintainer might have to do this. 3) Issue a "FREE listname" command. The message you sent in step 2 should now be distributed. When it arrives at LISTSERV LISTSERV will recognize it as originating from a SERVed OFF address and <should> bounce it to the LISTSERV site maintainer(s) with the full headers intact. The headers will hopefully give enough information that you will be able to figure out what the subscribed address is that is causing the problem, or at least enough info to narrow it down. It's nasty either way, but those are the only ways I can think of to deal with the problem. Good luck, -- Jacob Haller, Technical Support L-Soft international, Inc http://www.lsoft.com/