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Outlook.com and Hotmail not receiving some emails since 5 November

Some Outlook.com and Hotmail users aren't getting emails because messages to them bounce, and senders are told they failed an SPF authentication check, even when their settings are correct. Windows Latest reproduced it on 8 November.

Use & Like · 8 November 2026 · Source: Windows Latest

What it means for you

If someone says their email bounced, or you're waiting for a code or invoice that never arrives, this bug may be why.

What to do

Ask senders to try again, and for important mail, give a second address for now.

The details

It seems to affect only a small share of messages, and resending sometimes works. One sender reported the same email reached a Gmail recipient but bounced at Hotmail. Microsoft hasn't commented.

Where and when: Outlook.com and Hotmail accounts, since at least 5 November

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We write every story in our own words from its source and check the facts before it goes up. Source: Windows Latest.