I wish there was a modern email listserv for people to subscribe / unsubscribe and maybe manage posting permissions for. Using chat servers or forums is an extr

I wish there was a modern email listserv for people to subscribe / unsubscribe and maybe manage posting permissions for. Using chat servers or forums is an extra barrier for people to overcome and prevents collaboration from a broader set of people. Mailgun kind of has a list service that works. But not an easy way for end users to self manage. Curious if anyone could recommend something that could be selfhosted or worth paying for?