GMS is in the process of delivering an email to a remote address. To do this, it needs to resolve the Mail Exchange (MX) records so that it knows the IP address of the mail server to deliver the message to. When GMS attempted to resolve the host name, an error was returned.
In this case session Undefined attempted to resolve the hostname "Undefined". A resolver error code of Undefined was returned. There may be more information in the TCP/IP error code Undefined.
There are many reasons that the DNS resolution may fail. Please check the articles below for more information.
- What are the error codes produced by DNS resolution?
- Do you have a list of the available winsock errors?
- What is an MX record?
- How do alerts work?
- What are common DNS configuration issues?
Keywords:resolve DNS failure 8271