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NDRs on a normal basis during Exchange 2003 to Exchange 2007 during coexistence

Posted on 2011-03-15
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Last Modified: 2012-05-11
We have begun moving mailboxes from Exchange 2003 to Exchange 2007 and are getting several NDR messages a day from both Internal and External sources to accounts that have not yet been moved.

I have checked a couple of these accounts, and they has no limitations on who can send email to them.

The issue here I believe is the hub transport server, as it had been inactive for the most part before the move. However the accounts on the Exchange Server 2007 do not seem to have this issue.

The size the mail stores is over 150GB so it will take more than a fews to get past this. Especially since they will only give us 6 hours/day to move the boxes.

Any ideas on what we are missing here?

Below is what we are seeing:

 This what we are getting from those sent from the inside
 This is the error when the email comes from outside
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Question by:j2luce
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Expert Comment

by:GundogTrainer
ID: 35138059
Is this when you are sending directly to users or does it only happen if you send to distribution lists ?
Also could you telnet to port 25 and type EHLO to show the avalable verbs lease as it could be an issue with 8bitmime.
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Author Comment

by:j2luce
ID: 35138436
So far it happens only when email is directed to users.

The 8bitmine ESMTP verb was on, when I telneted into the Exchange 2003 server.

I haved the removed 8bitmine ESMTP verb through ASDIEdit, and have verified that it is off now.

Waiting to see if it happens again.
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Author Comment

by:j2luce
ID: 35138581
Some additional information. Distribution lists do not seem to be an issue. However the issue with the outside email still is here:

#< #5.6.1 smtp;554 5.6.1 Body type not supported by Remote Host> #SMTP#

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Author Comment

by:j2luce
ID: 35139552
Okay I've turned 8bitmime off on both sides as the Hub Transport was advertising it as well. However now there is a new error.

#< #4.4.6> #SMTP#, which to what I can tell, the message has exceeed its hop count for delivery.

Everything does comes in through the hub transport, but not everything is bouncing.
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Expert Comment

by:GundogTrainer
ID: 35146436
Can you confirm SenderID is disabled on the 2007 box at the moment ?

(I know I'm not helping much at the moment but if it was easy you would have fixed it by now!)
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Author Comment

by:j2luce
ID: 35149728
We use a smart host so SenderId is not enabled. All the spam control is performed outside of Exchange.
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Accepted Solution

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j2luce earned 0 total points
ID: 35301986
Turned out that a loop was occurring due to a problem with of the the Exchange 2003 SMTP connectors that moved data between the Exchange servers. Ended up going through the logs and removing the malfunctioning connector and rebuilding it. Everything works now.
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by:Glen Knight
ID: 37445586
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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