SIMS 1.8b9d14 running on MacOS 8.1, 68K machine

SPEWS (spews.relays.osirusoft.com) is included on our RBL server list.
About a week ago, SPEWS added several of the Yahoo mail servers to its list.
As a result, much (most?) of the mail sent by Yahoo!Groups is getting
blocked.  Other Yahoo mail is being blocked as well.

We have also seen examples of blocked mail that is clearly spam,
judging from the same mail being sent to multiple addresses that
are known *not* to be subscribed to any groups.  The volume of
this spam is not large, though.  Given a choice between a little
spam and losing a lot of desirable mail, we'd like to white list
the Yahoo servers.

Although I'm interested in commentary about SPEWS decision to
list Yahoo (justifiable in that spam *is* originating there,
but questionable in terms of disservice to a very large user
community) ... my real question regards white lists and white listing.

I've set up a few router entries of the form
   <[EMAIL PROTECTED]> = [EMAIL PROTECTED]
to allow some incoming groups mail, but this method
is impractical on a large scale.

It looks as though the Yahoo mail server IP addresses *could*
be put on the "client hosts" list, which would white list them,
but this would also introduce an undesirable security hole.

Are there other options in SIMS to white list specific
servers or IP ranges?  Something I've missed in the documentation?

Thanks.

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