[MM3-users] Re: Splitting hosts: mta&core vs postorius

I've created https://gitlab.com/mailman/mailman/-/issues/735 for this and I've also done an experiment and found what I think is a workaround. If you set

[webservice]
hostname: greyarea-post.cam.ivimey.org

or maybe just greyarea-post would do, and then add to /etc/hosts on greyarea-post

0.0.0.0      greyarea-post.cam.ivimey.org

or whatever name you used for hostname this will get gunicorn to bind to the public interface and will include the proper hostname in the self_link responses.