You might want to review the history of this mailing list.
It was mentioned that a header is injected in the messages if Microsoft finds it suspicious, (spammy) but still was 'compelled' <sic> to send the message.

Eg..

X-Forefront-Antispam-Report: SFV:SPM; ...

The SPM, is the indicator..

Having said that, yes there have been a lot of 'leakage', but it was politely asked that this list not be used for reporting spam issues.

The normal abuse channels should be used.. but check for the SPM header first..

On 15-11-17 08:42 AM, Necip Cebeci wrote:
Hi all,

We are receiving very well targeted phishing attacks to our clients,
mail headers indicate that they originate from Office 365 servers.

Some of the hops in the message header goes like this

/eurprd09.prod.outlook.com/

/emea01-db3-obe.outbound.protection.outlook.com/

__

Is there an official channel of complaint to Office 365 for attacks like
this?  Or a contact at Microsoft in this list ?

Thanks fort he help

cid:image001.png@01D0B8A8.19157EC0

        

Necip Cebeci
IT Security Specialist
IT Network, Security and Risk Management

_necip.ceb...@borsaistanbul.com <mailto:necip.ceb...@borsaistanbul.com>_
*T.*+90 212 298 27 72
*F.*+90 212 298 25 00

Borsa Istanbul <http://www.borsaistanbul.com>

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