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?
Cloudflare Docs
Postmaster
Reference page with postmaster information for professionals, as well as a known limitations section.
1 Reply
Hello Leo, i cannot do that as i have no connection with xmhahamail.com
i'm trying to send emails to them and keep receiving the response i mentioned from your mx host
is there any way you could help me and check why mails towards xmhahamail.com and menghamail.com are bouncing with "upstream error"?
thank you leo