That they are cryptic is by design.
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. Aloha, Michael. -- Michael J Wise Microsoft Corporation| Spam Analysis "Your Spam Specimen Has Been Processed." Open a ticket for Hotmail<http://go.microsoft.com/fwlink/?LinkID=614866> ? -----Original Message----- From: post...@sfina.com <post...@sfina.com> Sent: Monday, August 25, 2025 11:39 AM To: Michael Wise <michael.w...@microsoft.com>; mailop@mailop.org Subject: Re: [EXTERNAL] [mailop] How to filter efficiently spam originating from a Microsoft customer? On 2025-08-25 14:09, Michael Wise wrote: > Sorry, I should have been more precise. > > These ones, from the message that you just sent: > > X-MS-Exchange-Organization-Network-Message-Id: > 2449da6f-4e1e-429f-0cc6-08dde401949a > > X-MS-Office365-Filtering-Correlation-Id: > 2449da6f-4e1e-429f-0cc6-08dde401949a > no need to apologize to me, you could have happily ignored my indirect unhappiness with your employer. now that you taught me to identify the relevant headers, their content is still quite cryptic to me. It seems individualized per message, not per customer. I would like to filter all messages from this one customer only, because your employer has legit customers whose messages I want to receive. How do I determine which part of those relevant headers identifies the individual customer? Note that this message made it past all the usual spam filters that block the more obvious nuisances. These actors know who they are targeting and why. There are about 10K individual lawyers in my province with write access to the Land Registry on which millions, sometimes billions are transacted every day. There is a real jackpot for whoever can successfully phish a single one of us. Thanks, Yuv
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