Email issue

I am having a big issue with email from one user. Here is the VERY unhelpful NDR:

Reporting-MTA: dns;
Received-From-MTA: dns;
Arrival-Date: Wed, 5 Oct 2011 10:49:31 -0700

Final-Recipient: rfc822;
Action: failed
Status: 5.2.1
X-Display-Name: Sheri Boyd

Here is the Message Tracking log:
SMTP: Message Submitted to Advance Queuing
SMTP: Started Message Submission to Advance Queue
SMTP: Message Submitted to Categorizer
SMTP: Message Categorized and Queued for Routing
SMTP: Message Queued for Local Delivery
SMTP: Message Delivered Locally to (email address)
SMTP: Non-Delivered Report Generated

This issue only happens to select users, while other users can receive the same email.

I already had MXLogin look at it, but htey say the message was delivered to the server with no issues.

Any help would be GREATLY appreciated.
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Oneal75Author Commented:
Excahnge 2003
Use the SMTP Archive Sink to check "where" the message is changed, and find the culprit.

SMTP Archive Sink: Pre-categorization set


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Oneal75Author Commented:
Installing the tool now and will then retest and post the results.
Just remember another test you can try :)

Telnet to mxlogic on port 25 with one user ok, and one ko and see the results :)

Check for any errors after submitting for relay.

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