Hello, I’m using a different host than the domain name and I used Cloudflare to point to the domain name from my host and everythings work well but I got one and I think one big problem when I try to send and receive emails it’s work well but for a specific emails I got " Mail delivery failed: returning message to sender ".
this is the mail returned:
Reporting-MTA: dns; genious56
Final-Recipient: rfc822;[email protected]
Remote-MTA: dns; mail.horizonpress.ma
Diagnostic-Code: smtp; 550 Access denied - Invalid HELO name (See RFC2821 18.104.22.168)