"Ahern, Shannon" wrote:

> Or are all of the lists getting spammed, but the listserv software
> automatically filters out spam for the unmoderated lists, but passes the
> buck for the moderated list?

My guess is that the spam filter didn't notice that this was
a spam, but it was rejected on the unmoderated lists because
on the unmoderated lists you require the poster to be a
subscriber.  I don't know whether it is possible to require
that on a moderated list (other than for the moderator to
enforce it manually which is what you've got now).

Being the system admin for the server on which we run
Listserv, I frequently see cases where some non-existent
address sends spam to a bunch of lists.  I see them in
this case because the non-existent spammer address causes
Listserv's attempted notifications to the spammer to
bounce to me....  What I see is "You are not allowed to
post the the BLAH list from your blah@blah.blah...." for
all the public non-moderated lists, and "Your message
has been forwarded to the moderator of the BLAH list...."
for all the moderated public lists.  But blessed peace
and quiet - no messages at all - for the those lists
which have always been confidential!  We are making a
lot of confidential lists these days....

I do notice that often either the non-existent spammer
address or the spam subject or contents are altered to
incorporate the name of the list in some way.  Perhaps
this is to foil the spam detector by making the messages
seem unique.

Margaret King
Michigan State University