zmprov getAllDomains
This guide explores the technical intricacies of this error, explains why it happens, and provides step-by-step solutions to resolve it.
If none of these conditions are met, Zimbra denies the relay. zimbra relay access denied
Ensure the email client is configured correctly.
The "Zimbra Relay Access Denied" error is a common SMTP rejection that occurs when the Zimbra MTA (Mail Transfer Agent) refuses to forward an email. This typically happens because the server doesn't recognize the sender as authorized—meaning the sender hasn't authenticated properly or their IP address isn't on the "trusted" list. The "Zimbra Relay Access Denied" error is a
If you see 554 5.7.1 Relay access denied , you have confirmed the problem.
The error is a security feature, not a bug. Without it, your Zimbra server would become an , which spammers would instantly hijack to send millions of malicious emails. Your IP would be blacklisted within hours. The error is a security feature, not a bug
Look for the sasl_method= field.
Does the output point to your Zimbra server’s IP or hostname? If the MX record points to an old server or a firewall that isn't forwarding traffic correctly, the mail server receiving the connection will reject the recipient.