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A comment on Outlook.com Is Quietly Rejecting Email from Domains Without DMARC. Parent comment

Re:Outlook.com Is Quietly Rejecting Email from Domains Witho... by toast0 on Sunday November 08, 2026 @05:18PM (#50417996)
> You don't have to, this is the key reason to have a DMARC monitoring service. It will tell you when there's a deliverability issue with some particular receiver.

It's been a while, but monitoring DMARC seemed pointless once you got things started. If my outbound mail fails to validate, I've asked the receivers to bounce it, and I should be able to see that on my own system.

Otherwise, I'm just getting reports about spoofed spam or people who need to adjust their mail forwarding, but I can't do anything about either.

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Re:Outlook.com Is Quietly Rejecting Email from Domains Witho... by jared_stewart on Sunday November 08, 2026 @05:38PM (#50418207)
right, if you're at a reject status DMARC monitoring is (and should be) boring.

But it provides a safe guard against accidentally broken mail flows as your email stack evolves over time which is where it pays dividends.

I would love to say that it would have alerted you ahead of time to this particular event, but given that it's the fix here you would never have seen it.

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