Here are the steps for setting up Mailman-based delivery on zwiki.org. It should be possible to use other mailing list software in a similar setup.

This is just a checklist of things I had to do when setting up the zwiki list. See also ZwikiAndMailingLists. You can find more details of zwiki properties at QuickReference.

your wiki's address), or: set post_policy to closed and set a mail_accept_nonmembers property containing the list's Sender address - with mailman, it's listname-bounces@domain