Note that with a standard email distribution list, I think these would end up in separately created per sender chats.
And standard email list servers won’t work either, see email list servers still not supported.
So @cracker0dks do you maybe have a pointer for a working free software “newsletter” server solution?
The only solution that could be made “easy to use”, without having to become a server admin, seems to be the BCC (relay) groups.