[Mimedefang] MX -> 127.0.0.1

[Les Mikesell]

I think I've seen this mentioned before but can't find the answer.  I'm
getting a bunch of spam where the sender MX ends up pointing to
127.0.0.1 or 0.0.0.0.  Is there a way to reject this quickly?  Not
only is there the obvious problem of a bounce, but many of the
destination users have moved and I'm forwarding to a box that does
detect this problem but does a "450 Domain in reverse-path
<chaifai at flashmail.net> resolves to an invalid IP address" temp_fail
so even the ones with valid recipients are backing up in my queue.

-- 
  Les Mikesell
   les at futuresource.com