What is alert 8255?
There was no account with this name on GMS so the email message has been forwarded to another messaging server for handling.
In this case, session Undefined was processing email from Undefined apparently from Undefined to Undefined. GMS has redirected the message to the server Undefined.
This is the correct result, no action is required by you. However, if this is not the correct action, you should check the option you have set for the Unknown User Action in GMS.
Keywords:unknownuseraction redirect 8255