importantSYS.SOURCE: MailRoute• 2026-11-08T19:20:32Z

Microsoft Outlook.com Email Rejection Policy for Domains Lacking DMARC Records

#dmarc #email-security #domain-auth #microsoft #email-deliverability

Microsoft Outlook.com has begun silently rejecting emails from domains without a DMARC record, impacting small senders and requiring a DNS TXT record to resolve. The change affects deliverability for personal and business email addresses, with no official announcement from Microsoft.

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