Alpha1
Well-known member
- Affected version
- 2.3.7
Error S3150 frequently occurs with Microsoft email domains. Its not a real bounce, but a notification that the admin needs to take action.
It happens when the sender reputation of the entire subnet is bad because someone else is spamming on an IP address within the same subnet as yours.
What it means is that Microsoft blocks the entire subnet your email IP is in. It has nothing to do with your own email practices. Microsoft will block all email until you either contact them or you contact your hosting to resolve the issue.
When this happens all email microsoft emails domains will keep soft bouncing and therefore multiple soft bounces will become hard bounces for valid email addresses. This can quickly cause a mass of valid users to have their account set to invalid.
The point of this error notification is to alert the admin. Therefore the logical way to process this error is to not cause a soft bounce, but a log in the Error log instead.
Code:
550 5.7.1 Unfortunately, messages from [xxx.xxx.xxx.xxx] 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. [VE1EUR01FT080.eop-EUR01.prod.protection.outlook.com]What it means is that Microsoft blocks the entire subnet your email IP is in. It has nothing to do with your own email practices. Microsoft will block all email until you either contact them or you contact your hosting to resolve the issue.
When this happens all email microsoft emails domains will keep soft bouncing and therefore multiple soft bounces will become hard bounces for valid email addresses. This can quickly cause a mass of valid users to have their account set to invalid.
The point of this error notification is to alert the admin. Therefore the logical way to process this error is to not cause a soft bounce, but a log in the Error log instead.
