[Eidolon]

I noticed the manual mentions...

Every mailing list has a set of email addresses that messages can be sent to. There's always one address for posting messages to the list, one address that bounces will be sent to, and addresses for processing email commands. For example, for a mailing list called mylist@example.com, you'd find these addresses:
* mylist@example.com
* mylist-join@example.com
* mylist-leave@example.com
* mylist-owner@example.com
* mylist-request@example.com
* mylist-bounces@example.com
* mylist-confirm@example.com
There's also an -admin address which also reaches the list administrators, but this address only exists for compatibility with older versions of Mailman.

None of these email addresses currently exist, and I'm not sure if I need to create these manually or whether mailman somehow creates them. If I have to create them then presumably I'd need to set up some sort of filter for mailman to handle them.