Environment: Exchange 5.5, sp4 with hotfixes.
NT4 domain, some boxes NT4, some W2K
Single organization, multiple sites, multiple servers in Seattle site
X400 connections between sites
Objects involved: mailboxes in Seattle and distribution lists in multiple sites.
Remote distribution lists are expanded locally
Client: Outlook 2000

Here's the procedure: Bridget sends out a message from "Internal Communications" (IC). 
 IC is a mailbox on one of the Seattle servers.  Bridget has full owner access to the 
IC mailbox, and has added it to her regular Outlook profile.  She sends out a weekly 
newsletter to all of our offices (global company, so this goes to multiple Exchange 
sites and uses multiple DL's to get there) from her mailbox.  She uses the "From" box 
to set the message as coming from IC, includes a delivery receipt, then sends out the 
message.  Each location gets it's own newsletter, so several messages are sent.

Two examples - one cross-site, one intra-site:
***Cross Site***
Users in LA did not receive their newsletter last Friday (LA was not the only site 
that failed, used here as an example).  Careful examination of the message logs showed 
the message traveling through the appropriate connectors and being passed off to the 
MTA in LA.  Along the way there is an "Internal Report Generated" event in the log.  
When I opened the properties, it would show a list of names and the words "not 
delivered".  No NDR came back through to Bridget (the original sender), nor to the IC 
mailbox.  

I had Bridget repeat the mailing, using a profile connecting directly to the IC 
mailbox and thus bypassing use of the "From" field.  The same result followed.

I then set a profile on my own workstation to the IC mailbox and tried one last time 
(to be certain of the time-stamp), and was at first unsuccessful.  A later attempt was 
successful.  Bridget has had a similar experience: what works just fine one time, does 
not work the next.  No changes have been made to the Exchange servers between attempts.

Mail flow between the two sites has not been interrupted at any point in this.

We started including delivery receipts on all messages, but only successful deliveries 
have been reported.  The failures are not being returned in any form.  Only the 
message tracking log shows the failures.

About an hour ago, I turned off "Expand remote DL's locally" on all of the Seattle 
servers.  Messages were sent to several out-of-site DL's and all were delivered 
successfully.  This *may* mean the cross-site problem is fixed, or may not - the issue 
has not been consistent - not all sendings to cross site DL's using the procedures 
described above were failing.


***Intra-site***
In another example, Bridget used the same procedure as above (her profile but "from" 
IC) to send a message to a list of users in Seattle.  Bridget's mailbox and the IC 
mailbox are both in Seattle, as is the DL used to send the message.  The message is 
normally delivered to all users.  Sometimes, such as last Friday, the message is 
delivered *only* to users on the same server as Bridget and the IC mailbox.

As above, no NDR's were ever returned.  Only the message tracking log shows the 
failures.

Ideas???


Darcy Adams
Sr. Exchange Administrator
Getty Images

601 N. 34th Street
Seattle, WA  98103
Tel 206-925-6617
Cell 206-255-0169

http://www.gettyimages.com
[EMAIL PROTECTED]



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