Answer
GMS Communication Server or GMS List Server has just processed the outstanding jobs for a list and found that a user who does not contribute to the list did not respond to the "reconfirmation" request that was sent to them. Therefore the member will be removed from the list automatically.
In this case, the member Undefined of the list Undefined has been removed from the list.
This is the correct result, no action is required by you.
See Also:
Keywords:Removed lurker confirmation list 8223