Our web hosting services offers *Mailman*. Messages coming through mailman
would be from an "acwe.org" address that we maintain.
https://www.list.org/docs.html
Vertical Response offers all of the above, plus opt-in/opt-out, GDPR
compliance (legal stuff), plus tons of graphics and templates to make it
easy to create great looking announcements.
https://app.verticalresponse.com/app/login/