Answer
GMS Communication Server has just processed an email message that was returned due to an earlier posting. The administrator has configured GMS Communication Server so that any bad messages (bounces) received get sent on to a particular address for further processing. This is normally the list owner or moderator. Until such time as further action is taken the membership of the list will not be affected.
In this case, the message (id Undefined) related to the list Undefined. for the return message from the member Undefined has been forwarded to Undefined.
This is the correct result, no action is required by you.
Keywords:bad message list bounce returned 8218