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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 mike_hearn on Sunday November 08, 2026 @03:42PM (#50416987)
Gmail only requires DMARC for senders that send >5000 emails per day. Below that it's not required. That rule only appeared in 2024 so I wouldn't say it's been required for a very long time. Perhaps you're thinking of DKIM, which is different.
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Re:Outlook.com Is Quietly Rejecting Email from Domains Witho... by castwide on Monday November 09, 2026 @03:09AM (#50422564)
Google required me to add a DMARC record for a domain that doesn't even send 5000 emails per year. I suspect it was because of another mail server that shared the same subnet but was not under my direct control.
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