What are my options if I want — what mailman does but: - email address of any user never disclosed to any other user - name/username shown should always be pr

What are my options if I want — what mailman does but: - email address of any user never disclosed to any other user - name/username shown should always be predefined — not read from mail/replied received - easy user management — add/remove/disable/ban/flag-and-put-on-hold etc — communication not publicly available or indexed - is not a forum at all — can be read on the web, but can’t be replied from anywhere other than an email client — way to reply to specific users without knowing their email - users can stop all or some users to reach out directly to them - other mailman features Good to have features: — enable things like some sort of “slow mode” either for some users or group wide