Hmm, issuing the listserv command
 
list global /spam
 
Excerpt from the LISTSERV lists known to [log in to unmask] on 3 Oct 1995
08:18
Search string: SPAM
 
***********************************************************************
* To subscribe, send mail to [log in to unmask] with the following *
* command in the text (not the subject) of your message:              *
*                                                                     *
*                         SUBSCRIBE listname                          *
*                                                                     *
* Replace 'listname' with the name in the first column of the table.  *
***********************************************************************
 
Network-wide ID  Full address and list description
---------------  ---------------------------------
SPAM-L           [log in to unmask]
                 Spam Prevention Discussion List
 
/Pete Weiss