Answer
GMS has sent an auto response message (which may have been a binary file, MIME encoded) in response to an incoming email.
In this particular case session Undefined was receiving an email from IP address Undefined. The email was apparently from Undefined to Undefined. The autoresponse message was sent to Undefined.
This is the correct result, no action is required by you.
See Also:
Keywords:Autoresponder holiday 8234