GMS is returning a message because it has not been delivered yet. GMS has tried to send it every 12 minutes for 72 hours. Both these times may be changed by the administrator.
In this case, session Undefined was was processing a message to be delivered to the server Undefined (IP address Undefined). The local folder name is Undefined. The message that could not be delivered was from Undefined to Undefined so GMS has returned the original message to Undefined.
There is no problem with GMS, so no action is required by you. However, you may wish to investigate the problem with the remote server.
Keywords:message delayed 8391