Using Classic Outlook on Windows for personal email, calendar, and contact management
I am having the same issue.
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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
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I am having the same issue.
Even after updating DKIM DMARC and SPF its failing then
EX736432
Title:
Some users may be unable to send, or see delays up to two hours when sending email messages through Exchange Online
User impact:
Users may be unable to send, or see delays up to two hours when sending, email messages through Exchange Online.
More info:
These failures and delays could occur when sending email through any Exchange Online connection method. Users may receive a Non-Delivery Report (NDR) when a message fails to send.
Current status:
We discovered that a recent change intended to resolve another ongoing issue was enabled and introduced unbalanced network traffic to the affected infrastructure, leading to impact. To resolve the issue, we've disabled this change and are monitoring the infrastructure to confirm it remediates impact.
Scope of impact:
Some users who are serviced through the affected infrastructure and are sending email messages through any Exchange Online connection methods may be impacted.
Start time:
Sunday, March 10, 2024, at 7:00 PM UTC
Root cause:
A recent change intended to resolve another ongoing issue was enabled and introduced unbalanced network traffic to the affected infrastructure, leading to impact
Next update by:
Thursday, March 14, 2024, at 4:00 AM UTC
I had the problem on a 29-member mail list. Yes started March 8. Yahoo, and also AOL, and all ATT-"subsidiaries", e.g. sbcglobal. Everyone received and replied to my email Wednesday and Thursday, but Friday I received no responses from aol, Yahoo and Att group.
A colleague said the common link is ATT, who are trying to kill off tens of millions of unused email accounts. But this doesn't help me in the interim. Will I ever be able to email these guys as a group? I'd just like to get this resolved.
Any help will be valuable.
FYI
I'm seeing 3 IP addresses in that range (67.195.228.*) from my custom domain to Yahoo that gets deferred. They're successfully delivered in less than 1 hour. It should be instant delivery. Something is going on between Microsoft and Yahoo SMTP servers. I have all 3 DNS records setup since 2019 and never had any issues since then.
Here's one of the 3 outgoing email from my company domain (hosted on MS 365)
Reason: [{LED=450 4.4.318 Connection was closed abruptly (SuspiciousRemoteServerError)};{MSG=};{FQDN=mta5.am0.yahoodns.net};{IP=67.195.228.94};{LRT=3/11/2024 10:19:35 PM}]. OutboundProxyTargetIP: 67.195.228.94. OutboundProxyTargetHostName: mta5.am0.yahoodns.net
Same issue here. Multiple clients cannot send to yahoo.com
It appears to be the yahoo.com mail servers timing out.
67.195.228.111
67.195.228.94
pending to both of the yahoo.com servers at these addresses.