I believe this is what is called "listname WELCOME" file.
It can be  stored either in the LISTSERV FILELIST or
"listname FILELIST."
 
Details in the Owner's Manual Section 6.8 (issue cmd INFO OWNER)
 
[log in to unmask] Welcome to the "Mmgt. By Groping Network" 814 863 1843
31 Shields Bldg. --   Penn State    -- University Park, PA 16802-1202 USA