Answer
GMS Communication Server has just processed an email message that was returned due to an earlier posting. This list is a Read Only list which means that GMS Communication Server cannot make any changes to it. Therefore the email address will not be marked as suspended or removed.
In this case, the message (id Undefined) related to the list Undefined. The member Undefined would have been removed.
This is the correct result, no action is required by you.
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Keywords:bad message list bounce returned 8219