I’ve been having troubles sending emails to hotmail accounts for some weeks. I can send emails to accounts at gmail or other providers, but sending mails to hotmail give the following error:
Subject: Undelivered Mail Returned to Sender
This is the mail system at host mail2.ecloud.global.
I’m sorry to have to inform you that your message could not be delivered to one or more recipients. It’s attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system <private name @hotmail.com>: host hotmail-com.olc.protection.outlook.com[52.101.73.17] said: 550 5.7.1
Unfortunately, messages from [135.181.6.248] weren’t sent. Please contact
your Internet service provider since part of their network is on our block
list (S3150). You can also refer your provider to
Troubleshooting. [Name=Protocol
Filter Agent][AGT=PFA][MxId=11BB1AF925E2A177]
[AMS0EPF0000019D.eurprd05.prod.outlook.com 2025-05-09T09:37:55.709Z
08DD8D7C955887D2] (in reply to MAIL FROM command)
Is there a solution to this? As several of my contacts stick to hotmail it’s kind of showstopper for switching over to Murena / e/os.