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ChangesSparkPostMicrosoft outage: delays delivering to Outlook, Hotmail and Office 365

SparkPost: Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365

Incident updateNot classified yetChanged status.sparkpost.com (opens in new tab)
Summary

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AddedUpdateidentified#1
Before: not present
After: Delivery to Outlook.com, Hotmail, Live, MSN and Office 365 recipients is improving, but it hasn't fully recovered. Microsoft has restarted affected servers, is adding capacity, and reports that some regions are coming back online. Over the past hour the rate of temporary errors from Microsoft has dropped by about half, and more queued mail is being delivered on retry. Many delivery attempts are still being deferred, so recipients at Microsoft may keep seeing delays for a while. Microsoft is tracking the issue as EX1550543 and posting updates at https://status.cloud.microsoft/m365/referrer=serviceStatusRedirect. SparkPost's systems are working normally. Messages still waiting for Microsoft remain queued and will keep being retried automatically. Please don't resend them, because that will create duplicates once they're delivered. Messages whose expiration time passed during the outage have expired and generated a bounce event. They are no longer queued, so you can decide whether to resend those.

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History of this incident

TodayFriday, November 13Fri, Nov 13

4 incident changes

YesterdayThursday, November 12Thu, Nov 12

2 incident changes

Cite this

Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365 on SparkPost’s status page, changed 2026-11-13 03:13 UTC (change 5 of 6).

Title
Incident updated: Microsoft outage: delays delivering to Outlook, Hotmail and Office 365
Vendor
SparkPost
Date
URL
https://rewindex.com/change/r76cb3ac7c22169

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