[Mimedefang] How to trap this spam

[Bill Maidment]

David F. Skoll wrote:

>
>If you are using greylisting, you must disable it for all mail relayed
>from any of your secondary MX hosts.  The reason becomes obvious with
>a little thought.
>  
>

Yes, that was what I concluded.

>You *can* use greylisting on the secondary MX hosts themselves if they share
>the same greylisting database as the primary MX host, but then you once
>again have a single point of failure (which secondary MX machines are
>supposed to eliminate.)
>
>  
>
Unfortunately we are using our ISP as secondary (penny-pinching PHB) so 
we can't control that path.

Thanks for the input.
Bill