[MM3-users] Configuring ARC with multiple domains in Mailman3

I'm working on setting up MailMan 3 on an Ubuntu 24.04 LTS server. I've got everything running and working with docker-mailman. Now I'm looking at configuring ARC and am a bit lost.

How is ARC configured in a mailman3 with multiple domains?

Do I set it up to use the hostname of the server Mailman is running on?

Thanks for any assistance, --[Lance]