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hn100.atproto.rocks
Outlook.com Is Quietly Rejecting Email from Domains Without DMARC
https://mailroute.net/blog/outlook-rejecting-email-without-dmarc

https://news.ycombinator.com/item?id=50416158
Outlook.com Is Quietly Rejecting Email From Domains Without DMARC | MailRoute
Since November 5, Outlook.com and Hotmail have been bouncing mail from domains with no DMARC record, small senders included. What changed, and the one-record fix.
mailroute.net
November 8, 2026 at 9:45 PM
hackernewsbot.bsky.social
Outlook.com Is Quietly Rejecting Email from Domains Without DMARC | Discussion
Outlook.com Is Quietly Rejecting Email From Domains Without DMARC | MailRoute
Since November 5, Outlook.com and Hotmail have been bouncing mail from domains with no DMARC record, small senders included. What changed, and the one-record fix.
mailroute.net
November 8, 2026 at 8:00 PM
theregister.com
Outlook.com bounces legit emails as Microsoft's authentication crackdown goes sideways
Outlook.com bounces legit emails as Microsoft's authentication crackdown goes sideways
Missing DMARC or wobbly SPF means your mail may be treated as suspicious
www.theregister.com
November 9, 2026 at 1:33 PM
sadservers.com
"Outlook Is Quietly Rejecting Email From Domains Without DMARC"
mailroute.net/blog/outlook...

If you run your own mail server, big email providers like Outlook and Gmail can start dropping your messages silently one day without warning or recourse and you are toast.
Outlook.com Is Quietly Rejecting Email From Domains Without DMARC | MailRoute
Since November 5, Outlook.com and Hotmail have been bouncing mail from domains with no DMARC record, small senders included. What changed, and the one-record fix.
mailroute.net
November 9, 2026 at 11:53 PM
hncompanion.com
Outlook.com is rejecting email from domains without DMARC
View Article | Discussion + AI Summary

Summary of HN discussion 🧵👇
Outlook.com Is Quietly Rejecting Email From Domains Without DMARC | MailRoute
Since November 5, Outlook.com and Hotmail have been bouncing mail from domains with no DMARC record, small senders included. What changed, and the one-record fix.
mailroute.net
November 9, 2026 at 6:00 AM
aman179102.bsky.social
Enforcing DMARC alignment breaks standard RFC compliance for independent forwarders lacking a policy record.
November 9, 2026 at 5:56 AM
emdiscussions.bsky.social
#microsoft #outlook #hotmail #live #msn #email #dmarc #mxroute
November 7, 2026 at 9:29 AM
stevelumia33.bsky.social
Configurer DMARC pour Outlook : SPF, DKIM et DMARC pas à pas www.blog-nouvelles-technologies.fr/392267/outlo...
Configurer DMARC pour Outlook : SPF, DKIM et DMARC pas à pas
Outlook.com rejette des mails sans DMARC (erreur 550 5.7.1). Comment configurer SPF, DKIM et DMARC, vérifier l’alignement et durcir la politique.
www.blog-nouvelles-technologies.fr
November 9, 2026 at 10:11 AM
leyrer.bsky.social
Wie viele Gemeinden erhalten wohl momentan keine oder weniger Emails?

Microsofts Outlook.com lehnt derzeit E-Mails kleiner Absender ohne DMARC-Eintrag ab – selbst wenn SPF und DKIM stimmen.
www.heise.de/news/Outlook...

#itfails #itfailsAT
Outlook.com: Die Mail ist echt – und sie kommt trotzdem nicht an
Outlook.com lehnt derzeit E-Mails kleiner Absender ohne DMARC-Eintrag ab – selbst wenn SPF und DKIM stimmen.
www.heise.de
November 9, 2026 at 8:39 PM
michal.spondr.cz.ap.brid.gy
Ondřej Dohnal a jeho rychlý průřez technologiemi SPF, DCIM a DMARC, sloužících k bezpečnějšímu emailu.
#openalt
November 8, 2026 at 1:36 PM
matusita.bsky.social
さっき知った

https://mailroute.net/blog/outlook-rejecting-email-without-dmarc

ついにそういう時代になった、かなぁ。p=none書いとけ、で逃げられる話ではあるんだけども、それは明示的に主張しろ、ということよね。

遠い未来、p=noneがすてられるときは来るのかどうか（やりすぎかな）。
Outlook.com Is Quietly Rejecting Email From Domains Without DMARC | MailRoute
Since November 5, Outlook.com and Hotmail have been bouncing mail from domains with no DMARC record, small senders included. What changed, and the one-record fix.
mailroute.net
November 9, 2026 at 8:01 AM
tomroyal.com
If you run any programmatic email senders for clients, time to check in on them - Microsoft has silently introduced a new DMARC requirement so Hotmail, Outlook etc are rejecting messages en-masse. Search your logs for 'AS9031519':

mailroute.net/blog/outlook...
Outlook.com Is Quietly Rejecting Email From Domains Without DMARC | MailRoute
Since November 5, Outlook.com and Hotmail have been bouncing mail from domains with no DMARC record, small senders included. What changed, and the one-record fix.
mailroute.net
November 9, 2026 at 12:13 PM
heiseonlineenglish.bsky.social
Outlook.com is currently rejecting emails from small senders without a DMARC record — even when SPF and DKIM checks pass.
Outlook.com: The email is real — but it still isn’t getting through
Outlook.com is currently rejecting emails from small senders without a DMARC record — even when SPF and DKIM checks pass.
www.heise.de
November 9, 2026 at 7:22 PM
mm-hacker-news.bsky.social
Outlook.com is rejecting email from domains without DMARC
https://mailroute.net/blog/outlook-rejecting-email-without-dmarc
November 10, 2026 at 8:33 AM
davidlafuente.bsky.social
Somehow, mailer daemon has returned
learn.microsoft.com/en-us/answer...
no recuerdo la ultima vez que un email me había rebotado. ¿Os está pasando cuando escribís a cuentas de Microsoft desde emails de dominios propios?
550 5.7.1 Message rejected: Message lacks SPF/DKIM/DMARC Auth Records - Microsoft Q&A
About 50% of my clients that have emailed me since yesterday are getting the message 550 5.7.1 Message rejected: Message lacks SPF/DKIM/DMARC Auth Records (AS9031519) [[TY2PEPF0000AB8A.apcprd03.prod.o...
learn.microsoft.com
November 9, 2026 at 9:39 AM
telleroutlook.bsky.social
Outlook.com has quietly bounced some mail from domains without DMARC records since Nov 5, 2026. The fix is one DNS TXT record. #email #DMARC

https://mailroute.net/blog/outlook-rejecting-email-without-dmarc
Outlook.com rejects no-DMARC mail. 550 5.7.1 bounce cites missing SPF/DKIM/DMARC records. Many affected domains pass SPF; DMARC ties auth to From. Fix: TXT _dmarc = v=DMARC1; p=none; verify with dig
November 9, 2026 at 9:23 AM
hackernewstop5.bsky.social
Outlook.com Is Quietly Rejecting Email from Domains Without DMARC

#HackerNews

<a href="https://mailroute.net/blog/outlook-rejecting-email-without-dmarc" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link" target="_blank" rel="noopener" data-link="bsky">https://mailroute.net/blog/outlook-rejecting-email-without-dmarc
Outlook.com Is Quietly Rejecting Email from Domains Without DMARC
November 8, 2026 at 7:54 PM
hacker-news.bsky.social
Outlook.com Is Quietly Rejecting Email from Domains Without DMARC [Discussion]
Outlook.com Is Quietly Rejecting Email from Domains Without DMARC
Outlook.com Is Quietly Rejecting Email from Domains Without DMARC
mailroute.net
November 8, 2026 at 10:52 PM
dmarcian.com
Join us as we cover how Japan’s regulatory environment is rapidly evolving to meet the realities of email-based threats, what regulations you need to be aware of, and how DMARC helps domain owners meet compliance and remain trusted in the ecosystem. dmarcian.com/dmarc-compli... #DMARC
DMARC in Japan: How DMARC Helps Domain Owners Demonstrate Compliance - dmarcian
November 9, 2026 at 12:02 PM
wadefelt.com
Shout out to MXroute for letting their users know about Microsoft's new DMARC policy and what to do. Solid service.
November 8, 2026 at 10:03 PM
chuiho.net
［情報］Outlook.com で正規メールが不達に。SPF・DMARC の確認を
Outlook.com（Hotmail・Live 含む）宛のメールが SPF・DMARC 絡みの理由で弾かれる報告。550 5.7.515 の意味と、SPF・DKIM・DMARC の確かめ方、中小サイトの対応をまとめる。
https://chuiho.net/posts/outlook-com-dmarc-reject-legit-mail/ #Outlookcom #DMARC
Outlook.com で正規メールが不達に。SPF・DMARC の確認を
Outlook.com（Hotmail・Live 含む）宛のメールが SPF・DMARC 絡みの理由で弾かれる報告。550 5.7.515 の意味と、SPF・DKIM・DMARC の確かめ方、中小サイトの対応をまとめる。
chuiho.net
November 9, 2026 at 3:08 PM
hnbot.gsuscs.xyz
Outlook.com Is Quietly Rejecting Email from Domains Without DMARC

https://mailroute.net/blog/outlook-rejecting-email-without-dmarc
November 8, 2026 at 8:10 PM
modernfashion.bsky.social
Free Powerful DMARC Generator
Choose a DMARC policy, add aggregate and forensic report addresses, and set alignment and failure reporting options. Copy the record and publish it at _dmarc on your domain.
devutilitykits.com/tools/dmarc-...
DMARC Record Generator - Policy, Reports and Alignment
Create a DMARC record with a policy, subdomain policy, report addresses, alignment and failure options, with advice for moving. More tools.
devutilitykits.com
November 9, 2026 at 6:16 PM
hnbest.bsky.social
Outlook.com is rejecting email from domains without DMARC https://mailroute.net/blog/outlook-rejecting-email-without-dmarc

comments #mailroute.net
November 9, 2026 at 8:00 AM
sivastin.bsky.social
SIGNORI

ho spostato l'MX

SPF, DKIM, DMARC ok che ne google ne 365 si lamentano.

la mia posta miocognome.com non è più in gmail

hashtag #sovranità digitale
Man Raising Glass in Toast
ALT: Man Raising Glass in Toast
static.klipy.com
November 9, 2026 at 12:09 PM