Yes, it was the "pop.stud.let.ruu.nl" account that was sending back
copies. I removed this person (who might not be to blame for all this)
from the list and I think it should be alright now.
As always, to unsubscribe from the mailing list, send a mail to
"listserv@ucsd.edu", leave the subject line empty, and write in the
body of the mail:
unsub YourUserName@Your.Domain.Name acid-jazz
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Cheers,
Erik.Boralv@CMD.UU.SE Webmaster: http://www.cmd.uu.se/AcidJazz/
Center for Human-Computer Studies Admin : acid-jazz@ucsd.edu
Uppsala University, SWEDEN