I am unable to send an email from Thunderbird to 2 hotmail accounts that I have been communicating with for several years. The issue has only recently started and I can s… (read more)
I am unable to send an email from Thunderbird to 2 hotmail accounts that I have been communicating with for several years. The issue has only recently started and I can send emails to them from another email account that I have on gmail and any other emails than these are fine from Thuderbird
Below is the return message that I receive - can you help
"" This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed permanently:
* andyfmorris@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: ** andyfmorris@hotmail.com ??:?? This message was created automatically by mail delivery software on the server .
Reporting-MTA: dns; avasout-peh-004 [212.159.14.20]
Received-From-MTA: dns; [192.168.1.81] [51.7.113.34]
Arrival-Date: Tue, 17 Feb 2026 11:05:53 +0000
Final-recipient: rfc822; andyfmorris@hotmail.com
Diagnostic-Code: smtp; 550 5.7.1 Unfortunately, messages from [212.159.14.20] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol Filter Agent][AGT=PFA][MxId=11BCD72C9602F57A] [DU2PEPF00028D0F.eurprd03.prod.outlook.com 2026-02-17T11:05:53.185Z 08DE6B964EE3CE26]
Last-attempt-Date: Tue, 17 Feb 2026 11:05:53 +0000 ""