The recipient's e-mail system doesn't have enough information to deliver the message. Please see the diagnostic text in the ...

{4}: The recipient's e-mail system doesn't have enough information to deliver the message. Please see the diagnostic text in the non-delivery report to determine whether it was the resolver or SMTP component that rejected the message. A resolver error means that the routing configuration couldn't find a delivery path. An SMTP error means that the DNS records for specific domains can't be located. For resolver issues, verify that the address spaces are configured correctly on the Send connectors. For SMTP issues, verify that the domain name is correct and that the domain is functional.