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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 litoE on Monday November 09, 2026 @01:13AM (#50421697)
The problem with this setup is that if I want to send email to [email protected] and example.com is actually handled by Outlook, I need to somehow know beforehand that email to example.com needs that special routing. Or do you just route ALL your outbound email through Outlooks MSA?
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Re:Outlook.com Is Quietly Rejecting Email from Domains Witho... by danielheath on Monday November 09, 2026 @02:19AM (#50422159)
Pretty easy to tell whether example.com uses outlook; it'll have MX records pointing there.
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Re:Outlook.com Is Quietly Rejecting Email from Domains Witho... by jeroenhd on Monday November 09, 2026 @06:00AM (#50423934)
You can usually figure that out by checking the MX records (though some spam filtering middlemen might make that hard to detect) and TXT records (if a domain imports Outlook's SPF list, it's probably on Outlook in the back).
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