Linux

You will immediately run into issues with delivery without an upstream partner or other known IP space, but ignoring that:

Keila is a pretty modern tool meant pretty specifically for this.

Ghost (the blog platform) has a lot of this stuff built-in, plus can host a static view of each.

ListMonk has been around a bit, but is more for campaigns I think.

Odoo community version has some pretty solid tools that will make it all super simple, plus has some other good tools. It may lack some of the deeper integration features, but again, it's dead simple and has a solid interface.

I think the classic answer would be Mailman. But I hope someone else has a better answer 😛

Ghost

!selfhosted@lemmy.world

!selfhosting@slrpnk.net

!selfhosted@feddit.de

!selfhosted@sh.itjust.works

These are the first few communities I found. Pretty sure they're in order of more to less users.