Answer
In order to prevent denial of service attacks, GMS limits the number of simultaneous connections from the same remote IP address. The default is to allow an unlimited number of connections via SMTP to your system, therefore you must at some point have set a limit.
In this case, session Undefined received another connection from Undefined when it already has Undefined connections. Therefore it has disconnected to allow system resources to be used for other connections.
If you wish to accept more simultaneous connections, you should increase the number of connections allowed for SMTP. This problem will not cause GMS any problems. This problem is most likely to be caused by someone who is attacking your system to attempt to find a weakness. If you wish to find out more, you will need to contact the owner of the remote system.
See Also:
- How do I contact the owner of a client?
- How do alerts work?
- How can I limit the number of connections to my server?
- How do I contact the owner of a remote server?
Keywords:SMTP too many connections 8125