Being a "substitute" listowner does put you in a difficult position,
Mary.

I would tell you to tell the person "list policy is we do not allow
anonymous postings" (I don't on my lists) but the vagaries of
"registration" of "names"  does put you in a bind.

As I said, I no longer understand the ins and outs of this, so I can't
be of much help.  I will say I am disappointed that no one who knows
more about it than I has spoken up on the list.

Douglas