On Mon, 8 Aug 2005, Hancock, Scott wrote:
>
> According to the MS docs, I need a final destination that will reject
> undeliverable mail and thus prevent a mail loop.
>
> I want Exim to accept mail destined for the shared domain from the
> internet but reject or pipe to null if the same mail is relayed back
> from the internal exchange servers.
It's not generally possible to tell the difference between a new message
and one that has been relayed. It sounds like what you need to do is put
an authoritative list of local users on the Exim box which it will use to
verify addresses. Undeliverable email will then never reach the Exchange
server.
Tony.
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