Hello, I’m not sure if this is a Cloudflare issue but we are not able to receive email from one specific domain. The Microsoft Outlook community has already looked into this they were unable to help. If anybody feels this is a Cloudflare-related issue, please let me know.
The topic of your post does not sound like the problem is related to Cloudflare, but your post does not contain enough relevant detail to be able to answer your question.