Mail delivery failed: returning message to sender Error

gakaguka

Registered
Jun 16, 2020
2
0
1
Alaca, Çorum
cPanel Access Level
Root Administrator
This message was created automatically by mail delivery software.


A message that you sent could not be delivered to one or more of its

recipients. This is a permanent error. The following address(es) failed:


ar*********@hotmail.com

host hotmail-com.olc.protection.outlook.com [104.47.1.33]

SMTP error from remote mail server after pipelined MAIL FROM:<me******@*****.com> SIZE=3534:

550 5.7.1 Unfortunately, messages from [***.***.***.**] 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 Troubleshooting. [VE1EUR01FT028.eop-EUR01.prod.protection.outlook.com]


I cannot send mail to outlook services in any way. Where should I configure?
 

cPanelLauren

Product Owner
Staff member
Nov 14, 2017
13,304
1,250
313
Houston
Please note that this is ultimately something that you need to discuss with your provider, based on that message it’s likely that the issue isn’t something you did at all, it’s related to your provider’s network. They’ve placed all the IPs in part of their network on a block list.