Error_messages

 %MAILSERV-F-LSTNOTAVA, Index of lists is presently unavailable

     No mailing list index information is currently available.
     This may or may not be a temporary condition. Try using the
     DIRECTORY/LIST command in the meantime.

 %MAILSERV-F-NOMAILLIST, mailing lists are not enabled

     The mail server is not configured to operate as a list server.

 %MAILSERV-W-MAXPARM, too many parameters

     You supplied a parameter after the LISTS command. The LISTS
     command does not accept any parameters. Resend the command
     without specifying any parameter.