News.Ycombinator Microsoft Outlook.com Email Rejection Issue Affects Users
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Microsoft has been rejecting emails sent to Outlook.com recipients due to a fault or overly aggressive blocking rules. This issue affects certain IP addresses, which are being rejected for violating reputation rules or appearing on a block list. Users of Microsoft Outlook free and personal accounts have reported a sudden spike in email rejections since late January.
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2026-01-31
Users report spike in email rejections for Outlook accounts
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Microsoft acknowledges email rejection issue
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