As often happens, posting here led to solving the problem for myself.
Turns out I had a mail rule that was supposed to be catching and
replying to the notices; it was failing. A subsequent rule was
deleting *-bounce notification messages (under the assumption that all
the ones I wanted to do someth
I have a list set up with two addresses as Administrator, and with the
option checked to notify the administrator of subscriptions and
unsubscribe requests. (No approval needed for either.) This was
working fine until recently, when I changed some options on this and a
number of lists to have just
