block list
After sending my first email with Mailbox I received the following message:
This is the mail system at host mout-y-111.mailbox.org.
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
<pxxxxxxx@hotmail.com>: host
hotmail-com.olc.protection.outlook.com[52.101.40.28] said: 550 5.7.1
Unfortunately, messages from [91.198.250.236] 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
http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol
Filter Agent][AGT=PFA][MxId=11BBCEC90742FEB2]
[CY4PEPF0000E9CF.namprd03.prod.outlook.com 2025-09-03T07:37:01.983Z
08DDE76486D2B2F3] (in reply to MAIL FROM command)
<txxxxxx@hotmail.com>: host
hotmail-com.olc.protection.outlook.com[52.101.40.28] said: 550 5.7.1
Unfortunately, messages from [91.198.250.236] 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
http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol
Filter Agent][AGT=PFA][MxId=11BBCEC90742FEB2]
[CY4PEPF0000E9CF.namprd03.prod.outlook.com 2025-09-03T07:37:01.983Z
08DDE76486D2B2F3] (in reply to MAIL FROM command)
Can anyone tell me what tot do?
The same problem 
Hi,
thank you very much for your message. We are very sorry for the inconvenience. We are in contact with Microsoft and we are working very hard so that our network will be unblocked. Until then we ask for a little more patience.
If you have any further questions in the meantime, please contact our support team. You can reach our helpdesk here: https://support.mailbox.org. Alternatively, you can send an email to helpdesk@mailbox.org. Our support team will take care of your request.
With kind regards
Your mailbox.org team
Hi,
thank you very much for your message. We are very sorry for the inconvenience. We are in contact with Microsoft and we are working very hard so that our network will be unblocked. Until then we ask for a little more patience.
If you have any further questions in the meantime, please contact our support team. You can reach our helpdesk here: https://support.mailbox.org. Alternatively, you can send an email to helpdesk@mailbox.org. Our support team will take care of your request.
With kind regards
Your mailbox.org team
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