I have a domain that is using Exim. We have been getting tons of 
spam directed to dictionary generated addresses but usually one 
or more of the addresses are valid domain addresses.

Is it possible to discard ANY message that has ANY address that 
is not a valid address in my domain?

i.e.
{Will be delivered}                       {Will be delivered}
TO: [EMAIL PROTECTED],[EMAIL PROTECTED]          TO: [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]                       CC: [EMAIL PROTECTED]
BCC: [EMAIL PROTECTED]


{Will be discarded}                        {Will be discarded}
TO: [EMAIL PROTECTED], [EMAIL PROTECTED]          TO: [EMAIL PROTECTED]
CC: [EMAIL PROTECTED], [EMAIL PROTECTED]         CC: austin.ambl.com
BCC: [EMAIL PROTECTED]                    BCC: [EMAIL PROTECTED]

There is no [EMAIL PROTECTED] or [EMAIL PROTECTED] accounts on my domain.
I don't care if there are valid addresses in the list. If there 
are ANY invalid accounts for my domain in the TO, CC, or BCC 
lists, I want the messages discarded.

This would eliminate 99.5% of our spam.



                
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