Answer
There are not enough local system resources to process this connection. Therefore GMS has disconnected.
In this case, session Undefined received a connection from Undefined.
If the remote system complies with Internet Standards, it will attempt to connect to your server in a few minutes or hours to try to send the message again. No action is required by you unless you see a persistence of this error. In this case, please contact Gordano Support.
See Also:
Keywords:SMTP too few threads 8126