Emails to hotmail being returned
Since 17th June any email I send to an hotmail account is being returned with the message
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed permanently:
* (removed)@hotmail.com
Reason: A message that you sent to the following recipient could not be delivered due to a permanent error. ** The remote server ?? responded with: ** (removed)@hotmail.com ??:?? This message was created automatically by mail delivery software on the server .
I have not made any changes, and it worked previously for years - do you have any suggestions as to the problem? I have tried sending to 3 Hotmail accounts and are all being returned - all other emails work correctly.
I am using plusnet.
Ŋuɖoɖo si wotia
It appears that Plusnet have fixed this problem.
Xle ŋuɖoɖo sia le goya me 👍 0All Replies (6)
Looking further down the email there is this "explanation". I have followed the link - but am unsure how to make the changes in Thunderbird.
Final-recipient: rfc822; (removed)@hotmail.com Diagnostic-Code: smtp; 550 5.7.515 Access denied, sending domain (removed).PLUS.COM doesn't meet the required authentication level. The sender's domain in the 5322.From address doesn't meet the authentication requirements defined for the sender. To learn how to fix this see: https://go.microsoft.com/fwlink/p/?linkid=2319303 Spf= Fail , Dkim= Pass , DMARC= Pass [DB4PR10MB6143.EURPRD10.PROD.OUTLOOK.COM 2025-06-19T18:35:16.947Z 08DDAD18B4DFCB43] [PR0P264CA0129.FRAP264.PROD.OUTLOOK.COM 2025-06-19T18:35:16.982Z 08DDAED286E68288] [AM4PEPF00025F97.EURPRD83.prod.outlook.com 2025-06-19T18:35:16.991Z 08DDAAD8CC76A8B7]
If the issue is SPF, DKIM or DMARC, the solution lies with your email provider to secure the server. I do encourage that you share these details with them - the security and authentication of your email address provider's email server is not within the bounds of Thunderbird management.
NoahSUMO trɔe
I too have had this happen over the last couple of days. Similar non-delivery messages, in my case relating to emails sent to an Outlook address and a Live.co.uk address. Not sure how to ensure the necessary changes are made to my emails.
I contacted Plusnet again and this time they admitted it was a problem and are working to fix it. They say Microsoft had made some changes.
I've had a similar response from PlusNet as follows: "There is a known issue whereby intermittent failures to send emails to certain recipients. This is currently being investigated".
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