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Starting a couple of days ago, I am unable to send emails to Yahoo accounts from my Outlook email. Here is the error message I receive:
Your message wasn't delivered. Despite repeated attempts to deliver your message, a connection to the remote server was closed abruptly.
Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that your email system is unable to connecto their email system. Give them the error details shown below. It's likely that the recipient's email admin is the only one who can fix this problem.
For Email Admins
This often indicates the recipient's firewall SMTP fixup setting or other firewall settings are preventing the SMTP protocol negotiation from succeeding.
For more information and tips to fix this issue see this article: https://go.microsoft.com/fwlink/?LinkId=389361.
I went to the link suggested, and did not understand the instructions. Please assist. Thank you.
Using Classic Outlook on Windows for personal email, calendar, and contact management
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
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If this issue is missing/invalid DNS records for your domain name, the answer is never. Microsoft most likely can't edit your DNS records because they don't have permission to edit it. You do.
As this is a known issue I would recommend that Microsoft have the DKIM and DMARC records as required in the Microsoft Exchange section of the DNS Records tab in Setting -> Domains and have the ability to check their status there.
Adding DKIM, like Ankita mentioned, fixed the problem for me.
How to use DKIM for email in your custom domain | Microsoft Learn
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When is microsoft going to fix this problem, since we are all having the same issue? It is not reasonable to expect every user to be able to resolve this using the specified instructions.