In this case, if I’m understanding it right, the traffic never got IN to the 
Office365 environment, or if so, it might not have been associated with the 
actual domain in question, but … the number of times I’ve used Message Trace 
can be counted on the fingers of one hand; I much prefer working with NDRs and 
the full headers in such cases. ☹

Aloha,
Michael.
--
Michael J Wise | Microsoft | Spam Analysis | "Your Spam Specimen Has Been 
Processed." | Got the Junk Mail Reporting 
Tool<http://www.microsoft.com/en-us/download/details.aspx?id=18275> ?

From: Aaron C. de Bruyn [mailto:[email protected]]
Sent: Wednesday, August 17, 2016 3:35 PM
To: Michael Wise <[email protected]>
Cc: [email protected]
Subject: Re: [mailop] Tracking Office 365 Delay notices?

On Wed, Aug 17, 2016 at 3:20 PM, Michael Wise 
<[email protected]<mailto:[email protected]>> wrote:
No worries! ☺
$DIETY knows, these things happen.

Yup.

I'm not sure if you can comment on one part of my original question.  In this 
situation the message obviously didn't make it from hotmail to Office 365 
because of the expired domain / no MX records--but in the past I've tried 
troubleshooting rejected messages and they frequently won't show up in message 
tracing.

Is there a point in the spam filtering where a message can get rejected, but it 
doesn't show up in tracing?

-A
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