Let's Encrypt for Discussion Lists

I searched, and found a couple of older posts about this that have been closed. If you can automate Let’s Encrypt for our domains, why can’t you also do this for our discussion lists? It would be nice to not have to broadcast our passwords for the admin on our control panels over unencrypted http connections.

I would really like to make use for the discussion lists feature that’s included in my account, but I can’t in good conscious ask people to give me their email addresses for use in a system that’s easy to break into with the simplest of packet sniffing.