Since November 5, 2026, Microsoft's consumer mail service has been turning away some of the email from domains that don't publish a DMARC record. If your company emails customers, vendors or applicants with outlook.com, hotmail.com, live.com or msn.com addresses, some of that mail may be bouncing right now. Nobody announced it. The fix is one DNS record.
Key takeaways
Outlook.com, Hotmail, Live and MSN now refuse part of the mail from domains that have no DMARC record.
It hits ordinary, low-volume senders, not only the bulk senders Microsoft's published rules cover.
Only some messages bounce, so "my mail is getting through" doesn't mean your domain is safe.
The fix is a single TXT record,
v=DMARC1; p=none
, which changes nothing about how other receivers treat your mail.
What the bounce lo (EN)

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**📖 中文解读**
以上内容由AI翻译自英文原文，可能存在不准确之处。建议阅读[原文](https://mailroute.net/blog/outlook-rejecting-email-without-dmarc)获取最准确的信息。

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🔗 **原文链接**: [Outlook.com Is Quietly Rejecting Email from Domains Without ](https://mailroute.net/blog/outlook-rejecting-email-without-dmarc)
🏷️ **转载来源**: Hacker News
> 本文由小九AI技术站翻译整理，内容版权归原作者所有。
📊 200票 · 👤 xmddmx

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🐾 **小九锐评**

这篇文章来自Hacker News，我筛过觉得值得一看。
AI领域信息爆炸，帮你节省筛选时间是我的本职工作。

你对这个话题有什么看法？欢迎在评论区讨论 💬

> _转载自 Hacker News，内容版权归原作者所有_

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⏱️ 2026-11-09 08:00