Re: why does exchange go outbound for unknown internal mail?

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On Thu, 05 May 2005 09:05:38 +0100, "Mark Arnold [MVP]"
<mark@xxxxxxxx> wrote:

>On Thu, 05 May 2005 15:52:17 +0930, Andrew
><bart3rNOSPAM@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
>>Hi,
>>
>>My exchange server is working fine, except for when mail is sent to
>>invalid addresses internally. If it can find the address, it sends it
>>to the right mailbox, but if it can't find the address, it pushes it
>>back out through my firewall to my firewall, which then sends it back
>>to the exchange server!
>>
>>In the event log i see a bunch of errors saying:
>>A non-delivery report with a status code of 4.4.6 was generated for
>>recipient 'blah@xxxxxxxx'
>>Cause: The maximum hop count was exceeded for this message. This
>>non-delivery report can also be caused if a looping condition exists
>>between sending and receiving servers that are not in the same
>>Exchange organization. In this situation, the message bounces back and
>>forth until the hop count is exceeded.
>>
>>I want it to behave such that when it can't find the recipient, it
>>just sends an NDR to the sender, instead of trying to re-route the
>>message to somewhere else.
>>
>>
>>Any ideas?
>>Thanks
>>
>>Andrew
>
>It shouldn't be going outbound. What version of Exchange are you using
>and does it have a smarthost where it delivers normal outbound mail or
>does it have some address where a copy of the messages is sent.


We are running Exchange 2003 Enterprise edition.
It does have a smarthost which delivers normal outbound mail, but I
don't want it to send mail out through the smarthost which is only
going to come back to the Exchange server anyway.

this is why i get the 'maximum hop count was exceeded' message,
because I get stuck in a loop.

Mail that is destined for my mail server should never be pushed back
out to the internet? surely?

.

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