Hi Mitch - one option is to use google groups which has an email reflector option.
Our club uses one, we set it up to be invisible to non-members so avoid someone harvesting addresses or posting spam.
It also allows attachments. You send one email to the reflector and it sends a copy to everyone on the list.
There is a web interface to invite new folks to subscribe, to add/delete/change emails, etc.
You can allow members to post, or prevent them from posting, etc.https://groups.google.com/forum/?hl=en#
-- Tom, N5EG