The spammer has followed up.  New headers below.

On 2025-08-25 14:47, Michael Wise wrote:
That they are cryptic is by design.

and would Microsoft consider a nice plea to make them slightly less cryptic? no wish to identify the culprit -- a Norwich Order would be a better tool for succh purpose. All I need is to discern the flow of spam from ham.


They identify the specific message so that we can trace other details of it, not the least being the TenantId, which will show who the sender org actually is, but in the case of traffic from outlook.com, it may end in 12 “a”s, so then we need the Network Message-Id to dig further.

You know Microsoft's internal better than me. Am I trying to filter by TenantID? All I asked for is an efficient way to filter spam originating from a singled-out Microsoft customer (TenantID?). Preferably something that scale as easy as copy&paste a new ID into a list of unwanted sources and that works instantly. Reporting to Microsoft does not seem to be the way to go, this is what came in a few hours ago:

Return-Path: <monica.techtre...@outlook.com>
Delivered-To: <ME>
Received: from MYSERVER
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Authentication-Results: MYSERVER; dkim=pass
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([fe80::cd68:19c:a5c3:a23b%5]) with mapi id 15.20.9073.010; Tue, 26 Aug 2025
 15:34:46 +0000
From: "Monica R. cooper" <monica.techtre...@outlook.com>
To: "ME" <ME>
Subject: RE: Verified Canadian Attorneys
Thread-Topic: Verified Canadian Attorneys
Thread-Index: AdwV6Vid0s3WXSgmQSi+C+LhGWo8/QAvkz4g
Disposition-Notification-To: "Monica R. cooper"
        <monica.techtre...@outlook.com>
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Date: Tue, 26 Aug 2025 15:34:46 +0000
Message-ID:
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