Please inform me of an opensource way to run one that I can actually get configured properly.

Mailman 3 is acceptable, imho. It's been a few years since I worked with it, but I was able to design a reliable public instance of it (https://mailman.haskell.org) with a few days of effort, including the migration from mailman v2.

	▲	pabs3 3 hours ago \| parent \| next [-]
		Mailman 3 is horrible, which is why some folks have ported Mailman 2 to Python3. https://github.com/jaredmauch/mailman2-python3
	▲	Symbiote 14 hours ago \| parent \| prev [-]
		Same here — I think I set Mailman 3 up in a day, although I was already familiar with setting up the mail (Postfix) part.

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layer8 12 hours ago | parent | prev | next [-]

Besides GNU Mailman, there’s also Sympa [0]. It’s fairly straightforward to set those up on a VPS with Debian or similar if you’re familiar with running a Linux server.

[0] https://www.sympa.community/

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teddyh 15 hours ago | parent | prev | next [-]

I’ve heard good things about <https://mailinabox.email>.

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giancarlostoro 15 hours ago | parent | prev [-]

Same for self-hosted mail...

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mrweasel 14 hours ago | parent | next [-]

I haven't tried it, so it might be more complicated than the documentation leads me to believe, but Mox looks promising: https://www.xmox.nl/

	▲	yogorenapan 14 hours ago \| parent [-]
		I've been using it for a year now. Can vouch for the quality and reliability

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eschaton 13 hours ago | parent | prev [-]

Proxmox has a mail appliance.