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Outage in Twilio

Email Delivery Delays to Microsoft-Hosted Inboxes

Minor
November 12, 2026 - Started about 6 hours ago
Official incident page

Incident Report

We have identified an issue with Email. Users may experience delays in message delivery to some inboxes hosted by Microsoft This does not impact mail send targeted to other inbox provider other than Microsoft. We will provide another update in 1 hour or as soon as more information becomes available.
Components affected
Twilio Other

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Latest Updates ( sorted recent to last )
IDENTIFIED about 2 hours ago - at 11/12/2026 10:59PM

We have identified the issue of delays in email delivery to Microsoft-hosted inboxes. Due to a third-party provider dependency, messages to these inboxes may continue to be deferred before delivery. Mail is continuing to queue and is not being dropped at this time. We will provide another update in 4 hours or as soon as more information becomes available.

IDENTIFIED about 4 hours ago - at 11/12/2026 08:59PM

We have identified the issue of delayed email delivery to Microsoft inbox providers for Email Inbox Providers. Due to a third-party provider dependency, messages sent to these inboxes are being deferred and queued for later delivery. There is no mail loss at this time. We will provide another update in 2 hours or as soon as more information becomes available.

IDENTIFIED about 5 hours ago - at 11/12/2026 07:58PM

We have identified the issue of delayed email delivery to Microsoft inbox providers for Email. Due to a third-party provider dependency, messages to these inboxes may remain queued longer than usual, but there is no mail loss at this time. We will provide another update in 1 hour or as soon as more information becomes available.

INVESTIGATING about 6 hours ago - at 11/12/2026 07:42PM

We have identified an issue with Email. Users may experience delays in message delivery to some inboxes hosted by Microsoft This does not impact mail send targeted to other inbox provider other than Microsoft. We will provide another update in 1 hour or as soon as more information becomes available.

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