Email Routing to xmhahamail.com and menghamail.com
Hello, in last 2 days we noticed mails towards the 2 mentioned domains not delivering due to the following smtp response:
421 4.3.0 Upstream error, please check https://developers.cloudflare.com/email-routing/postmaster for possible reasons why. VVNhHjZl0OJU
Could you kindly check what could be the issue?
421 4.3.0 Upstream error, please check https://developers.cloudflare.com/email-routing/postmaster for possible reasons why. VVNhHjZl0OJU
Could you kindly check what could be the issue?
Cloudflare Docs
Reference page with postmaster information for professionals, as well as a known limitations section.
Welcome to the official Cloudflare Developers server. Here you can ask for help and stay updated with the latest news
86,942Members
Resources
Similar Threads
Was this page helpful?
