Actually it takes 21 bad commands to be served out with the current
version, and only 10 per incoming message count. LISTSERV cannot stop
after just 3 bad commands because many "business" mail systems generate
pseudo-letterheads of up to 10 lines (in some exaggerated cases, longer
than 10 lines, but people who want to put their three titles on three
separate lines deserve what they get :-) ).
Eric