groups.io lists are free for lists with under 100 participants, the $20/mo would be for a premium plan which doesn't sound like you'd need that. https://groups

groups.io lists are free for lists with under 100 participants, the $20/mo would be for a premium plan which doesn't sound like you'd need that. https://groups.io/static/compare https://groups.io/static/compare google mailing lists are also free. I still host one there, although mostly try to not use google. But it's another free choice.