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Distribution List Not Getting External Emails - NDR 5.1.1

Posted on 2008-10-01
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Last Modified: 2009-02-09
I have Exchange 2007 running with an edge transport server. I am recieving the following error when attempting to send to a newly created distribution list in Exchange 2007 from an external address (such as yahoo):  

faxes@anyorg.org>: host 10.1.1.238[host 10.1.1.238] said: 550 5.1.1 User
    unknown (in reply to RCPT TO command)

I can send to this distribution list internally with no problems. I have checked and verified that the "require that all senders are authenticated" checkbox is UNCHECKED.

The IP referenced in the error message refers to our Edge transport server. Anyone able to provide some insight?

Thanks
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Question by:NPDAdmin
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Expert Comment

by:gupnit
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Hi,
Make sure that Edge Subcription is working fine and that the DG was syncd to Edge Server.
It may not be getting it in its list
Cheers
Nitin
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by:NPDAdmin
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I have verified the edge subscription is working properly. How can I check the DG was synced to Edge?
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Expert Comment

by:gupnit
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Hi
Run
Test-EdgeSynchronization -VerifyRecipient example@yourdomain.com
Here is Link to guide you more ::: http://technet.microsoft.com/en-us/library/bb266939(EXCHG.80).aspx
Thanks
Nitin
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by:NPDAdmin
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Ahh yes - I did run that as well. Looking at the output, Recipient Status does say Syncronized.

This is driving me nuts.
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Expert Comment

by:gupnit
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Follow this http://forums.msexchange.org/m_1800473954/mpage_1/key_/tm.htm#1800473954
and force subscription again !
Thanks
Nitin
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by:NPDAdmin
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I appreciate the link however in my original post I mentioned I already unchecked the "Require that all senders are authenticated" checkbox. I have also already tried forcing a resync as noted above, and also tried recreating the edge subscription. Is there something I am missing here?
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by:gupnit
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Opps....I agree I overlooked...!! http://support.microsoft.com/kb/930463/
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by:NPDAdmin
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I do not believe the above MS KB article will apply to my current situation. Number 1, I have Exchange 2007 SP1 installed - this article references update rollup 4 - released prior to SP1. Secondly, the article references a cause for recipients who are located in domains other than the Hub Transport server or outside the root domain tree. The distribution list I am sending to is in the same domain as the Hub Transport server.

Any other ideas?
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Accepted Solution

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gupnit earned 250 total points
Comment Utility
Hi,
Lets look at it again !!!
  • Create another DG (new) with same Users and during creation unchecked the "Require that all senders are authenticated" checkbox.
  • Now force Edge Sync
  • Verify that the new DG got replicated.
  • And then send a mail from outside.
Do let me know
Thanks
Nitin
 
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Author Comment

by:NPDAdmin
Comment Utility
I have followed the above procedure several times during the last few days with no luck. However, this morning I created a new distribution group (again) with the same name as previously, only all lowercase. After removing the check from the "Require that all senders are authenticated" checkbox, I was able to send to this distribution list from an external address. This leads me to believe that sending to a distribution list is case sensitive, which I didn't think was the case. Regardless, thank you for the assistance in narrowing down a solution.
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Expert Comment

by:gupnit
Comment Utility
Hi,
I have never come across Case Sensitve Issue.
To be honest - I was thinking that you are making some mistake in the process, hence didnt know what to recommendd
Cheers
 Nitin
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Expert Comment

by:phantomh
Comment Utility
Hi, I have just come across the exact same thing, the distribution group's email address is case sensitive, if it is all lower case it will except any case but when you specify the case it will only except that case - this is very dumb!!!!
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