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How we got to enforce DMARC for sub-domains of Microsoft’s largest consumer email brands

The month was August 2017, and none of Microsoft’s largest consumer email brands – msn.com, live.com, hotmail.com, and outlook.com – had DMARC reject records in place. Not one. As a result, we were still seeing lots and lots of spoofing.

Read the full article: https://blogs.msdn.microsoft.com/tzink/2017/10/21/how-we-got-to-enforce-dmarc-for-sub-domains-of-microsofts-largest-consumer-email-brands/