What is the name of the domain?
What is the error number?
550
What is the error message?
Unfortunately, messages from [104.30.6.54] weren’t sent. Please contact your Internet service provider since part of their network is on our block list (S3150)
What is the issue you’re encountering
The IP address 104.30.6.199 g-bjj.cloudflare-email.org is on Outlook’s block list
What steps have you taken to resolve the issue?
No steps I can take other than reporting this
What are the steps to reproduce the issue?
Email relayed via Cloudflare is not delivered to Outlook