"LISTSERV site administrators' forum" <[log in to unmask]>
wrote on 08/03/2007 01:01:53 PM:

> It currently does go through Mailscanner/Spamassassin first (I mention
> this above).  We don't reject Spam out of hand though due to potential
> false positivies.  Instead, we tag it with a header and at delivery time

> route it into a user's Junk folder.

Mailscanner is a milter (http://en.wikipedia.org/wiki/Milter ) so it can
reject or tempfail suspect spam without rejecting it.  Legitmate mail will
then be returned to sender if it's a FP.  Then they can fix it and
resubmit.

Have you looked into a script that whitelists the subscribers of the list?
 That should help resuce the FPs too.

I know if I was a subscriber, I would not want to receive spam that was
submitted via a list I was on.  Keeping it out of the archives is probably
moot for most subscribers/lists.  Yours may be different.