Re: Weird NDR
- From: "Rich Matheisen [MVP]" <richnews@xxxxxxxxxxxxxxxxxxxxx>
- Date: Fri, 10 Mar 2006 21:56:48 -0500
PL <plecki2@xxxxxxxxxxxx> wrote:
Scenario: A message is sent from Exchange to a group of contacts with
external addresses, all in the same domain. Let's say there's 25 of
them. Three of these turn out to be invalid and their server responds
with a 557 invalid recipient. Exchange generates an NDR back to the
sender, but the way it presents the NDR is what the problem is. This
might be easier to understand by seeing an example below. As you can
see, it lists the same address for all intended recipients (valid and
invalid) and basically only tells me that one address was invalid, but
it was more than that, as I found from other sources. In the example
below, userfour and userfive were invalid, others were valid. The NDR
does not make sense. Is this a problem with Exchange or the other
server?
The other server. Exchange is just reporting the status code ,
extended status code, and text strring as it's returned from the other
machine.
Checking the SMTP Protocol Log may shed some light on what's
happening. If the other server is rejecting the RCPT TO commands
you'll see that in the logs. If it accepts the RCPT TO and later
delivers a NDR the SMTP Protocol Log won't be much help becasue all
the info is in the message.
There may be an attachment to the message from the MTA. That
attachment should have the details in it concerning which server said
what.
--
Rich Matheisen
MCSE+I, Exchange MVP
MS Exchange FAQ at http://www.swinc.com/resource/exch_faq.htm
Don't send mail to this address mailto:h.pott@xxxxxxxxxxxxx
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.
- References:
- Weird NDR
- From: PL
- Weird NDR
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