Proudly, I recieved the mail tell me that Cloudflare Email Routing beta is now available for me. I tried the CER immediately, but there is something wrong perhaps.
I tried several times, When I send a test mail to my custom email addresse, the mail was returned. The reason is “host amir.mx.cloudflare.net[22.214.171.124] said: 502 5.5.1 Unrecognized command (in reply to RCPT TO command)”
How to solve the problem?