Ask HN: Simple plain text email lists/newsletters?

I am involved with several charities than need a super basic email/notificaiton service for contacting members. Simple stuff like announcing upcoming events etc.

Currently we use gmail contact groups with BCC, but it's cumbersome and prone to mistakes. There is also the constant fear of passing google's permitted messages limits.

In looking for alternatives almost everything I search for is totally marketing focused with complicated 'campaigns'. I would much prefer an old style listserv/mailman service - craft your email locally, send it to list@mydoma.in and everyone receives a copy.

Does such a simple thing exist anyway in a form I don't have to manage myself?