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Exchange 2003 - internet email bouncing to one recipient in a group; internal email to same group succeeds...?

Posted on 2006-04-28
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Last Modified: 2008-01-09
Hi All,
I've got 5 users in a distribution group in Exchange 2003.  All users are domain users in the same security group and group policy is applied equally to each of them.  When I send an email to the group from within Exchange (like OWA or Outlook 2003 internally), all users get the message.  When I send to the same group from the internet, I'm currently getting this bounce:

Reporting-MTA: dns; mydomain.com
Received-From-MTA: dns;imf44aec.mail.bellsouth.net
Arrival-Date: Fri, 28 Apr 2006 08:46:47 -0500

Final-Recipient: rfc822;dispatch@mydomain.com
Action: failed
Status: 5.1.4
X-Display-Name: Danny Jones

Yesterday, I was getting the same thing, but with a completely different group member's name for "X-Dispaly-Name" and not Danny Jones like above.  I've taken no action that I can remember between getting that message yesterday and this message today.

Any advice or observations are welcome.

Thanks,
Terry
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Question by:colepc
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LVL 12

Expert Comment

by:aa230002
ID: 16562228
on the properties of Distribution group in Active Directory Users and Computers, you can mention - not to recieve emails from outside, or receieve emails only from Authenticated users.
Make sure that this checkbox is not selected. i think its on Exchange General tab.

Thanks.
Amit Aggarwal.
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Author Comment

by:colepc
ID: 16562440
That checks out ok.  There are no restrictions on who can receive mail.  This is true on the group object and the member/user objects.
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LVL 12

Expert Comment

by:aa230002
ID: 16562589
Just to make sure that we both are on the same page -
Distribution Group properties - Exchange General Tab - Message restrictions - Accept messages from -

is it happening to all your Groups ? are these Universal Distribution Groups or mail enabled security groups?

Numeric Code: 5.1.4

Possible Cause: Two objects have the same proxy address, and mail is sent to that address. This issue may also occur if the recipient does not exist on the remote server.

Troubleshooting: Verify the recipient address and resend the message.

Thanks,
Amit Aggarwal.

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Author Comment

by:colepc
ID: 16562971
I had previously verifiied the info per the KB you cite above for the 5.1.4 code.  It is a universal distribution group.  We are on the same page.

The situation has different details now.  I created a 2nd group and added the same members to it.  Test emails to this new group are delivered to all members.
Afterwards, the condition remains the same when sending to the 1st group.  One recipient is bounced.

Now, I've deleted both groups.  I restarted the microsoft exchange system attendant service (which cycled all dependent services also).
I created a new group with the same name as the original one.  I added all 5 members to the group.  Now the only on that receives email sent to the group is "Danny Jones"!  (He was the one it was bouncing on earlier).  No NDR is generated for the remainder of the group members.  In Message Tracking, the tracking details for messages sent to this latest "version" of the original group show delivery only to Danny.  No other details are  present after the line showing delivery to his local mailbox.

It gets better:  I deleted the group again.  I've verified that the group does not exist in AD (all lookups fail; can't find it anywhere; mailbox and public folders do not show it).  I've restared the system attendant service(s) again.  If I send mail to this (deleted) group now, it still is accepted (no NDR is created) and delivered to "Danny".

Short of restarting the server, I'm a bit stumped.  I cannot restart the server until tomorrow afternoon.

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Accepted Solution

by:
aa230002 earned 2000 total points
ID: 16563050
ok. Try these things.
1st thing, Check all the email addresses of Danny. This user might have an additional smtp address exactly same as the group you are creating.
User properties - email addresses tab in ADUC.

2nd thing, open ADUC, right click on domain name in the left and click find - Advanced tab - choose the field User - email addresses (and then later email addresses others) and then put a condition like starts with or is(exactly) and then value - the email address of your group.
see, if you find any entry in your org with this smtp address added to some other user account.

try to find group - email addresses (and then later email addresses others) with condition.

I think, the smtp address of your group (in question) also exists to some other object in AD and that we need to find out.

Thanks,
Amit Aggarwal.
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Author Comment

by:colepc
ID: 16563208
That found it.  my group email address was also listed as an SMTP address in Danny's AD user account.  I removed it, searched the other AD users (small network) and then recreated the group, restarted system attendant and it appears to be working as expected now.

Thanks for your input and helping me look thru this!

Terry
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