Enabling Members to Mass Email other Members

So I’m brand new to Wix and, although not a techie myself, I’m pretty adept at learning some coding and understanding interface between data sets, forms, etc. I’m setting up a member-restricted site for a networking group I run, and I want the members (once logged in) to be able to use a form or some other input option on the site to submit questions/requests/invitations that then get e-blasted to all other members of the site. I want the member recipients of the message to be able to reply to that site-submitted information so that they are in a one-on-one email exchange moving forward with the person who submitted the information. I’m open to creative ways around this, whether it means integrating a third-party option with the site, using a Contact form that uses my email as the primary email and maybe a Gmail group distribution email for the secondary email, etc.

Should be doable. I would make a form for users, submit it to db and on the onBeforeSave run a function that gets all email address from your users and in a loop sends out 1 email with all members as a recipient (BCC, usually seperated by comma´s) and the reply-to to the email address of the user that filled out the form. That way a reply would automatically go to the submitter of the form.