Microsoft confirms Outlook bug blocked legitimate emails for several days in November
Microsoft confirmed a bug that caused legitimate emails to be rejected on Outlook.com, Hotmail and Live accounts for several days in November. The cause was a faulty update to its antispam rules, which misclassified valid messages as unwanted and rejected them before they reached inboxes. The incident, logged as EX1545193, ran from November 6 at 19:00 to November 9 at 12:02, Spanish peninsular time. Microsoft reverted the update and on November 10 confirmed the service was back to normal. Rejected emails do not recover on their own.
In 40 seconds
- An update to Microsoft's antispam rules rejected legitimate emails on Outlook.com, Hotmail and Live.
- The window acknowledged by Microsoft runs from November 6 at 19:00 to November 9 at 12:02, Spanish peninsular time.
- The company reverted the update and on November 10 confirmed normal service.
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