Starting May 5, 2025, all businesses - regardless of size - must meet Microsoft’s stricter email authentication requirements when sending to Outlook, Hotmail, and Live addresses. These changes are designed to reduce spoofing and impersonation, aligning with similar updates from Google and Yahoo to improve overall email security.
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DMARC Gets Serious: Microsoft Enforces Stricter Email Rules
Posted by Ann Westerheim on 4/30/25 4:47 PM
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Tags: eMail, SPF record, Cybersecurity, email scams, cybersecurity, DMARC