Answer
GMS Communication Server or GMS List Server has just processed the outstanding jobs for a list and found a user who does not contribute to the list (a lurker). A message has been sent to them asking them to confirm that they are still interested in being a member of the list. If they do not respond, their membership will be suspended automatically.
In this case, the member Undefined of the list Undefined has been sent a reconfirmation message.
This is the correct result, no action is required by you.
See Also:
Keywords:lurker list reconfirmation 8317