Exactly... however - many mail servers _are_ misconfigured. especially
those using an external-internal relay...
>Sit back and watch absolutely nothing happen, unless both mailers are
>misconfigured. Even the venerable RFC821
>(http://www.faqs.org/rfcs/std/std10.html) notes that:
>
> Of course, server-SMTPs should not send notification
> messages about problems with notification messages.
>
Technical Incursion Countermeasures
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