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As of February 2021, does EOP/Microsoft now send DMARC aggregate reports?
I believe I have spotted evidence that the answer is yes. If you look at this answers.microsoft.com thread the answer states: TL;DR Office 365 currently does not send out any DMARC reports. If ...
JeremyTBradshaw - Not yet Jeremy. You found the right User Voice however there is no ETA yet.
Yesterday I've noticed that Microsoft is sending DMARC aggregate reports, but the emails do not always reach their destination because the emails do not conform to the Internet Message Format (RFC 5322) standard. The BASE64 encoded attachment data is a single line without proper line breaks, causing the message to be rejected by most MTA's.
After forcing our mail servers to ignore the RFC violation for Microsoft's DMARC email address (dmarcreport@microsoft.com), the emails were accepted and processed. After a few hours I've received reports for @hotmail.*, @outlook.*, @live.* and @msn.com recipient addresses.
After forcing our mail servers to ignore the RFC violation for Microsoft's DMARC email address (dmarcreport@microsoft.com), the emails were accepted and processed. After a few hours I've received reports for @hotmail.*, @outlook.*, @live.* and @msn.com recipient addresses.
We have only recently started implementing DMARC and had also come across the lack of response from MS domains. How did you detect that emails were being sent from mailto:dmarcreport@microsoft.com if they were not being delivered?
The fact that only consumer domains are being used seems to correspond to this DMARC Mail (Public Preview feature) at https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/use-dmarc-to-validate-email?view=o365-worldwide#dmarc-mail-public-preview-feature
Just_AskingI've noticed "Maximum allowed line length is 998 octets" errors in the mail server reject log.