Please remove me

Think you have to send a mail to the list with “unsubscribe” in the body of the mail.

I do not want to unsubscribe. Please keep me on your list

My message was for Karen Koch.

No - when you became member of this list you've been told to manage all list-related stuff using the URL at the end of every list mail:
<list.genealogy.net/mm/listinfo/oldenburg-l>. This is how all genealogy.net lists work.
Nikolaus Ordemann