> have found his SenderHostIsNotLocal matcher to be insufficient
> to identify that the sender is fake because it simply checks to
> see if foo.com is a local address.

Depending upon how mobile your users are, you could use SMTP AUTH, or use
RemoteAddrNotInNetwork to discard messages claiming to be from a local user
that hasn't originated from one of your known subnets.

        --- Noel


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