GMS is sending a warning to a sender of a message to let them know that the message has not been delivered yet and has been delayed. The warning message is sent after 24 hours by default but 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 delayed message was from Undefined to Undefined so GMS has sent a warning 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 8390