It has multiple definitions
If I have a list of people who I want to email, I call that a mailing list.
I also call it a mailing list when there is a program whose job is to make it easy for people to subscribe themselves, unsubscribe themselves, and mail the whole list. (Possibly with various filters, etc.)
Cheers,
Ben
I have come to believe that idealism without discipline is a quick road to disaster, while discipline without idealism is pointless. -- Aaron Ward (my brother)