Outlook emails not deliverable to yahoo and aol

Anonymous
2024-01-13T17:14:45+00:00

Starting this week, our emails to yahoo and aol accounts are not being delivered, but emails to other email accounts are working. Here is one of the yahoo error message: 1/12/2024 9:27:16 PM - Server at SJ2PR02MB10076.namprd02.prod.outlook.com returned '550 5.4.300 Message expired -> 421 4.4.2 Connection dropped due to SocketError' 1/12/2024 9:26:15 PM - Server at mta5.am0.yahoodns.net (67.195.204.73) returned '421 4.4.2 Connection dropped due to SocketError'

And here is the aol error message: 1/12/2024 9:27:38 PM - Server at PH0PR02MB7367.namprd02.prod.outlook.com returned '550 5.4.300 Message expired -> 421 4.4.2 Connection dropped due to SocketError'
1/12/2024 9:15:15 PM - Server at mx-aol.mail.gm0.yahoodns.net (67.195.204.80) returned '421 4.4.2 Connection dropped due to SocketError'

Outlook | Windows | Classic Outlook for Windows | For home

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  1. Anonymous
    2024-03-15T19:46:17+00:00

    Domain name and DNS records are two different things. DNS records point to a domain name. Even though you do not own hotmail.fr you can still configure dkim if you know what you are doing and have a premium account. If you are unsure how to configure dkim in hotmail then you can reach out to support here: https://support.microsoft.com/en-us/office/how-to-get-support-for-outlook-com-f5482a98-616c-4d44-b7c5-8aaaadf5c11a

    This is an article that explains the problem that all mail admins should have been prepared for: https://blogs.cisco.com/security/february-1-2024-a-date-all-email-senders-should-care-about and here https://www.proofpoint.com/us/blog/email-and-cloud-threats/google-and-yahoo-set-new-email-authentication-requirements

    Not many mail admins use hotmail. But for people who do, I said you need to test with tools like mx****. Hotmail already has the dns records setup for you if you use the free service and the free service does not offer dmarc or dkim signing. You have to have a premium plan or office 365 subscription as I mentioned.

    WIth office 365 you can setup dkim here: https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/email-authentication-dkim-configure?view=o365-worldwide

    Good luck

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  3. Ron-6928 4,991 Reputation points
    2024-03-15T20:05:07+00:00

    >>Even though you do not own hotmail.fr you can still configure dkim

    How you can configure DKIM for hotmail.fr is my question.

    and they already have DKIM as we all hope for: https://easydmarc.com/tools/dkim-lookup?domain=hotmail.fr

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  4. Ron-6928 4,991 Reputation points
    2024-03-15T20:05:52+00:00

    I don't have problems so I'm not reaching out to anyone. Got all my DNS records setup correctly years ago.

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  5. Ron-6928 4,991 Reputation points
    2024-03-15T20:07:54+00:00

    >> free version of hotmail does not support dkim or dmarc

    How do you explain these records?

    https://easydmarc.com/tools/dkim-lookup?domain=hotmail.fr https://easydmarc.com/tools/dmarc-lookup?domain=hotmail.fr

    Oh btw, I have none of your cool certifications. I learn from experience and mostly self taught.

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