Answer
A remote system unexpectedly issued an AUTH greeting command to GMS. This command is not legal at this point in the communication between the client and server.
In this case session Undefined was processing a connection from the server/client at Undefined when it received the command
Undefined
so GMS responded with
Undefined
This problem is caused by a remote system (server or client) which does not comply with Internet Standards. In order to resolve this issue you will need to contact the owner of the server or client at Undefined and ask them to contact their software suppliers for an updated version.
See Also:
- What is the SMTP AUTH command?
- How do I contact the owner of a client?
- How do I contact the owner of a remote server?
- What is SMTP Response Code Theory?
Keywords:AUTH bad sequnce compliance RFC821 RFC2821 RFC2554