Between November 5 and 9, 2026, an incident occurred in which some emails from domains that did not publish DMARC records were rejected by Microsoft’s consumer email services, including Outlook.com, Hotmail, Live, and MSN. Because the issue arose without an official announcement from Microsoft, it caused confusion among many users and businesses. Outlook.com Rejected Mail From Domains Without DMARC | MailRoute https://mailroute.net/blog/outlook-rejecting-e