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Exchange NDR in outlook (#4.0.0 smtp;451 and lrschumann@mmcanby.com)

Posted on 2009-02-19
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Last Modified: 2012-05-06
One of my users ( CEO) has informed me that he got 4 bounced emails from system administrator in his outlook. 3 of the bounced email are to the same domain  but the forth one is to a diffrent user. The bad part is that all the emails were sent about 3 or 4 weeks ago ( diffrent dates), but it took this long to get the bounced back error email.

Your message did not reach some or all of the intended recipients.

 
Subject:      Attn: - limestone replacement         
Sent:      1/30/2009 10:27 AM       

The following recipient(s) could not be reached:

recipient3@recipient2.edu on 2/18/2009 7:10 PM
The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator.
<ourdomain.com #4.0.0 smtp;451 <recipient3@recipient2.edu>... Requested mail action not taken: mailbox unavailable>






Your message did not reach some or all of the intended recipients.

 
Subject:      Attn: Ann bylie  H. Smith         
Sent:      1/22/2009 1:57 PM       

The following recipient(s) could not be reached:

recipient2@recipientdomain2.edu on 2/18/2009 7:10 PM
The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator.
<ourdomain.com #4.0.0 smtp;451 <recipient2@recipientdomain2>... Requested mail action not taken: mailbox unavailable>





Your message did not reach some or all of the intended recipients.

 
Subject:       retirement agreement         
Sent:      2/14/2009 11:03 AM       

The following recipient(s) could not be reached:

recipient@recipient.com on 2/18/2009 7:10 PM
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.
<ourdomain.com #4.2.0 smtp;450 4.2.0 <recipient1@recipientdomain1.com>: Recipient address rejected: The Postgrey server on this AutumnTECH E-mail Messaging Security Appliance says there is 2 seconds left before you can send e-mail to mmcanby.com>




Your message did not reach some or all of the intended recipients. 
 
 
Subject:	Attn: - limestone replacement	   
Sent:	1/30/2009 10:27 AM	 
 
The following recipient(s) could not be reached: 
 
recipient3@recipient2.edu on 2/18/2009 7:10 PM
The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator.
<ourdomain.com #4.0.0 smtp;451 <recipient3@recipient2.edu>... Requested mail action not taken: mailbox unavailable> 
 
 
 
 
 
 
Your message did not reach some or all of the intended recipients. 
 
 
Subject:	Attn: Ann bylie  H. Smith	   
Sent:	1/22/2009 1:57 PM	 
 
The following recipient(s) could not be reached: 
 
recipient2@recipientdomain2.edu on 2/18/2009 7:10 PM
The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator.
<ourdomain.com #4.0.0 smtp;451 <recipient2@recipientdomain2>... Requested mail action not taken: mailbox unavailable> 
 
 
 
 
 
Your message did not reach some or all of the intended recipients. 
 
 
Subject:	 retirement agreement	   
Sent:	2/14/2009 11:03 AM	 
 
The following recipient(s) could not be reached: 
 
recipient@recipient.com on 2/18/2009 7:10 PM
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.
<ourdomain.com #4.2.0 smtp;450 4.2.0 <recipient1@recipientdomain1.com>: Recipient address rejected: The Postgrey server on this AutumnTECH E-mail Messaging Security Appliance says there is 2 seconds left before you can send e-mail to mmcanby.com>

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Question by:netcomp
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8 Comments
 
LVL 65

Expert Comment

by:Mestha
ID: 23687647
Did you reboot the server around that time?
If so, sounds like the greylisting bug.
http://support.microsoft.com/kb/950757/

-M
0
 
LVL 1

Author Comment

by:netcomp
ID: 23692767
Will this happened another time when I rebooted the server about a month ago with another user, but I had not rebooted the server the past few weeks.

More important, Can you tell whey those emails were rejected the first place, or not gone out based on the NDR???????????????? My boss wants the answer asap :-),,,,,,,,,,
0
 
LVL 65

Expert Comment

by:Mestha
ID: 23693282
The NDR says why the message was rejected, the mailbox wasn't available.

However the error codes are 4.x.x which is temporary failure, usually that means greylisting, but the error doesn't say that. That isn't to say it WASN'T greylisting, but I would expect a site using greylisting to say.

Greylisting is antispam measure, which is usually pretty effective. It is just unfortunate that some implementations of greylisting cause Exchange to react in a negative way. I had hoped that Microsoft would push the hotfix out in automatic updates, but it wasn't to be.

-M
0
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LVL 1

Author Comment

by:netcomp
ID: 23693446
Should I contactthe recepient IT team and ask them to white list us. Are you saying that the update will let them get our emails.
0
 
LVL 1

Author Comment

by:netcomp
ID: 23693496
O My God Simon lives.  I thank God,      I thought you had left or you just hated me and did not want to respond to my questions in E.E.  You have no idea how happy I am. I started having trust issues in EE after I did not see you around. LOL
0
 
LVL 65

Expert Comment

by:Mestha
ID: 23693517
It depends on whether the recipient is using greylisting or not. If they are not then it may well have been a temporary failure. Not all errors are down to antispam measures.

Yes I do live.

-M
0
 
LVL 1

Author Comment

by:netcomp
ID: 23727878
Mestha,
I installed the patch from microsoft. So, do  we need to somehow contact the recepients and ask them to put us in their white list now. I am not still sure if this solves the problems of the emails bouncing back or does this only fix the issue of getting the messages back after a month.??
0
 
LVL 65

Accepted Solution

by:
Mestha earned 2000 total points
ID: 23727985
If you have installed the patch and restarted the SMTP Server Service, then you shouldn't need to do anything else.
What the patch does is resolve the problem with how Exchange copes with the reject.
You would only need to contact the recipients to ask for whitelisting if you were not going to install the patch.

-M
0

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