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non-Delivered Report (NDR) Generated

We have an outside user that emails two people in our company. One is delivered to the mailbox fine one is not. This user used to email both people fine.

Exchange 2003

See the attached image.
 NDR Screen Shot
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caligor
Asked:
caligor
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1 Solution
 
Rodney BarnhardtServer AdministratorCommented:
Does the sender recieve a bounce back? If so, I would have them forward that to you through and external account, if necessary. We have a similar problem except we were the sender. When I looked at the NDR it appears to be going out with the wrong mail format. She was using the cached address that would pop-up when she started typing. I deleted that and everything was fine. It seems that something was screwed up in the Outlook N2K file causing a problem in the addressing.
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giltjrCommented:
Is it safe to assume that:

1) Janet.Copland@ is still a valid e-mail address?
2) That Janet.Copland@ can received external e-mail from other people?
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caligorAuthor Commented:
@rbarnhardt No NDR as we have them turned off in the mail server. This particular user can email anyone else in the company. Ive seen that same issue with the n2k but this happens if the external user replies to a message from Janet.

@giltj yes on both.

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giltjrCommented:
--> appens if the external user replies to a message from Janet

What happens if that user tries to send mail directly to Janet and types in her e-mail address instead of replying to a e-mail?

It sounds almost to me as if Janet may have a "replyto" address setup and that there is something wrong with it.

Can other users (outside of your company) reply to message that Janet has sent?
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caligorAuthor Commented:
The NDR is generated if the external user types a new message or reply's to one sent by Janet.
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giltjrCommented:
I have not worked with Exchange, but other SMTP servers have a log that tell you why they generated the NDR.  Does Exhcnage have one?
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caligorAuthor Commented:
Never found the solution to this but it seems the problem has vanished.
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caligorAuthor Commented:
No solution but problem went away.
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