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Exchange 2003 5.2.1 error bounces emails seemingly at random

Posted on 2011-09-07
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Last Modified: 2012-05-12
SBS 2003 Exchange with SP2 no other rollups after that.
Server is upto date except some .net crap that won't install.

Email sent from outside LAN will sometimes bounce back to the sender with 5.2.1 error.
We have removed all limits on email sizes
It's not consistant at all, some will bounce some won't, we can't find a trigger that causes a message to bounce. Sometimes a message that's 17K will bounce from the server with a return to sender of 5.2.1

There does not appear to be anything touching the traffic like Anti Spam software or odd firewall software on the server.
Just plain old Anti Virus installed.

A telnet email session (25) with the server always results in a sucessfull email. With no 5.2.1 ever returned in my manual session with the server.

This has been going on for a few weeks, and I can not figure this out!
I have done extensive searching on this site and others.
Because it's across multiple users, I ruled out a currupt single user box.


Below is a transcript of a returned to sender message.

From: System Administrator
Sent: Wednesday, September 07, 2011 11:48 AM
To: ***********, J*****
Subject: Undeliverable: FW: DMV proposal
Your message did not reach some or all of the intended recipients.
      Subject:  FW: DMV proposal
      Sent:     9/7/2011 11:44 AM
The following recipient(s) cannot be reached:
      Ge**** ********** on 9/7/2011 11:48 AM
            The message reached the recipient's e-mail system, but delivery was refused.  Attempt to resend the message.  If it still fails, contact your system administrator.
            <the*********.com #5.2.1>
 
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Question by:funman1
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Accepted Solution

by:
TalkExchange earned 500 total points
ID: 36499940
Please increase the diagnostic logging on SMTP Protocol for all categories. Please check the logs when the email fails.

Also check if you get any 9667 ( name props) event ids

http://geekswithblogs.net/BWCA/archive/2009/06/09/another-reason-for-a-5.2.1-undeliverable-message-ndr.aspx
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Author Comment

by:funman1
ID: 36499966
We will try those first thing thank you for the advice. Though, do you think SMTP logging will help with it isn't SENDING that is the issue, it is RECEIVING?  Also this seems to be all external, not internal (so it doesn't seem to from one exchange to another like the link talks about)

addtional info:  
It has NOTHING to do with public folders (we tried to apply that MS fixit)
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LVL 8

Expert Comment

by:TalkExchange
ID: 36500029
Diagnostic logging will help in sending as well as receiving.
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Author Comment

by:funman1
ID: 36503910
Yep found LOTS of 9667
Cranked up the registry for NonMAPI Named Props Quota and Added Named Props Quota and set it to the same value.
Then dismounted and remounted the store.

So now we wait till I hear back from users :)
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Author Comment

by:funman1
ID: 36506400
TalkExchange:  we DID find some 9667 errors and upped the registry entries, we just have to wait now to see if it worked!  Thanks so much for your thoughts.
0
 
LVL 8

Expert Comment

by:TalkExchange
ID: 36507325
Good to know surely it should fix it
0
 

Author Comment

by:funman1
ID: 36570028
No Issues now so far, so I call it solved!
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Author Closing Comment

by:funman1
ID: 36570035
Issue Resolved now
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